Cybersecurity is at a turning point. Advanced AI models are dramatically accelerating vulnerability discovery and creating conditions ripe for exploitation, underscored by the announcement of Claude Mythos Preview. This marks a shift, and whether this technology will favor defenders or attackers will depend on the choices we make now. 

With the right safeguards, these capabilities can help trusted defenders identify and fix vulnerabilities across critical systems in hospitals, power grids, water, and telecommunications. Released irresponsibly or not properly secured, however, those same capabilities could be abused by malicious actors, threatening the foundations of our digital ecosystem. 

Much of the discussion has rightly focused on risks. As advanced AI models speed up the discovery of vulnerabilities, the way we fix them must speed up too. That means stronger pre-deployment risk assessments and close collaboration between governments, frontier AI developers, software providers, and the broader ecosystem to ensure these tools reduce, rather than increase, cyber risk. This is particularly important as AI systems themselves have become high‑value targets, requiring stronger protection of models, systems, data, and underlying infrastructure. 

This is ultimately an international challenge. Neither software supply chains nor threat actors stop at borders. Neither can our response. Meeting this moment will require shared approaches across countries, sectors, and systems—rooted in trust, shared standards, resilience, and responsible use. 

This moment is also an opportunity. Security has been and remains the top priority at Microsoft. Over the last two years, through our  Secure Future Initiative, we have strengthened our security foundations for this age of AI, in part by using AI to accelerate vulnerability discovery and remediation. We have also invested in fundamental AI for security research, including the development of open-source industry benchmarks that can be used to evaluate whether models are ready for real-world security work. We are accelerating that work through deeper public-private collaboration and in partnership with AI, including Anthropic’s Project Glasswing and OpenAI’s Trusted Access for Cyber program. 

Securing our digital ecosystem with next‑generation AI is within reach but is not automatic.  

Building secure foundations for the era of frontier AI  

Ensuring advanced AI technologies are used to strengthen cybersecurity requires deliberate and urgent action. We are sharing the following recommendations as practical steps governments, industry, and the broader ecosystem can take to ensure these tools, often referred to as “frontier AI”, reinforce the security foundations on which digital societies depend. And we hope to continue to partner with model providers, industry and government so we can work together to improve security outcomes for all. 

1. Reinforce core cybersecurity practices  

Advanced AI can strengthen cybersecurity only when strong, consistent cyber hygiene is already in place. As frontier AI accelerates vulnerability discovery and response, core practices such as rapid patching, access control, and system resilience become more critical, not less. 

Security gains in the frontier AI era depend on close coordination between technology providers advancing new capabilities and the organizations responsible for operating, updating, and securing real‑world systems. Without this interdependence, advanced AI cannot deliver durable improvements in security. No organization can solve these cybersecurity problems alone. 

That is why sustained investment in what we know works remains essential: secure‑by‑design product lifecycles, Zero Trust architectures, multi‑factor authentication, least‑privileged access, and ongoing security training. Broad adoption and harmonization of established cybersecurity frameworks to ensure consistent resilience across AI‑enabled systems. Trusted cloud environments that enable these practices at scale, supporting secure data handling, continuous patching, and the secure deployment of AI‑enabled tools for defenders.  

  2. Release advanced capabilities responsibly  

As frontier AI systems gain reasoning, coding, and agentic capabilities, some of the most serious security risks arise before deployment, including realistic misuse involving multi‑step reasoning, tool use, and reconnaissance. Technical safety benchmarks remain important, but they are insufficient without rigorous, real‑world testing.  

As a result, governments are increasingly establishing pre‑deployment evaluations that combine technical testing with threat modeling. These assessments are most effective when frontier developers work closely with organizations that track national‑security risks. Investing in secure evaluation environments and modern testing methods can help governments keep pace as capabilities advance.  

Responsible release practices, including phased and controlled access, are a critical extension of this approach. Our work with Anthropic in Project Glasswing offers one practical model, enabling trusted defenders to evaluate advanced capabilities in constrained settings prior to broader release. Similarly, OpenAI and Microsoft work closely through Trusted Access for Cyber program, and we already support OpenAI’s use of scoped, early deployments for safety and security testing.  

Responsibility does not end at release. Organizations that deploy frontier models are often best positioned to detect emerging misuse and should monitor, mitigate, and share threat information. Microsoft is working with peers through the Frontier Model Forum to advance best practices for evaluating and managing cyber risk and enable information sharing. Governments should encourage continued industry collaboration to restrict access for identified threat actors and counter adversarial or malicious use of advanced AI. 

  3. Modernize vulnerability management  

AI is changing both the speed of vulnerability discovery and what constitutes meaningful security risk. Faster discovery only improves security if triage, validation, and remediation can keep up. 

As AI accelerates discovery, vulnerability management must shift from tracking raw volume to reducing real‑world risk. That means prioritizing vulnerabilities that are genuinely exploitable, assigning clear responsibility for triage and remediation, and using phased, risk‑based disclosure when private coordination improves safety. Above all, systems must be designed around validation and realistic remediation capacity, not the assumption that more findings automatically lead to better security. 

Developers of frontier AI models should embed vulnerability coordination and disclosure directly into responsible‑release frameworks. And work with governments and industry to ensure findings are routed to the right owners, acted on early, and supported by clear coordination pathways. 

  4. Fix faster: Strengthen and accelerate response and remediation 

As AI accelerates vulnerability discovery, remediation must keep pace. Initiatives such as DARPA’s AI Cyber Challenge show how AI can help both find and fix flaws in open‑source software. Hardening defenses requires investment not just in detection tools but in the people, processes, and infrastructure responsible for fixing vulnerabilities, especially in critical sectors. 

Much of the software underpinning critical infrastructure relies on open‑source components maintained by small teams or volunteers with limited security capacity. A surge in AI‑enabled discovery risks overwhelming existing triage and disclosure processes. Efforts such as the GitHub Secure Open Source Fund, alongside investments by Microsoft and others through the Linux Foundation, Alpha‑Omega, and OpenSSF, are helping maintainers adapt in ways that are practical and aligned with existing workflows.  

Governments should treat remediation capacity as a core resilience priority, including sustained investment in and support for maintainers, surge capacity during large discovery events, and modernized disclosure pathways—recognizing that effective remediation still largely depends on human judgment, coordination, and time.  

  5. Advance AI security internationally 

AI security is essential to deploy AI at scale. Because AI systems, supply chains, and the risks they introduce operate across borders, national approaches alone will not be sufficient. 

Governments and industry should work together to build interoperable international foundations for AI security, including risk evaluation, coordinated vulnerability disclosure, and information sharing. Priorities should include strengthening the defensive use of AI, preventing misuse through shared norms and safeguards, and securing AI systems- and the AI technology stack.  

Global participation is critical. Countries and organizations with limited cybersecurity resources or legacy infrastructure are often the most exposed. International cooperation should prioritize capacity‑building, ensuring that the security benefits of AI are realized broadly and equitably. 

AI security is not just a safeguard; it is an enabler for innovation and growth. By acting collectively and moving quickly, governments and industry can strengthen global digital resilience and unlock the trusted adoption of AI across economies, critical infrastructure, and public services.

Meeting the moment: Use frontier AI capabilities to build trust and confidence  

Meeting this moment is ultimately about trust: not in any single technology or provider, but in our collective ability to introduce advanced AI responsibly.  

Used deliberately and built on strong security foundations, these capabilities can strengthen cybersecurity and reinforce confidence in the systems society depends on. The choice is not between innovation and security but whether we enable them to reinforce one another. 

That outcome is within reach. With governments, industry, and infrastructure operators aligned, advanced AI can be deployed in ways that match real‑world defensive capacity and support trusted, lawful action. Done right and working together, frontier AI can help protect the digital infrastructure that underpins modern life and build lasting confidence in its resilience. 

 

For more than a decade, the Microsoft Digital Crimes Unit (DCU) has persistently disrupted cybercrime and nation-state threats targeting people, organizations, and critical infrastructure. Explore major disruptions—and the ongoing cases and operations behind them here: Disrupting cyberthreats since 2008 | Microsoft

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Cyber threats to water systems are no longer hypothetical. When attacks succeed, communities can face loss of trust, safety concerns, or service disruptions.

Today, Microsoft, in collaboration with the Cyber Readiness Institute (CRI) and the Center on Cyber Technology and Innovation (CCTI), is releasing a report that examines both the urgency of this challenge and what it will take to close the cyber readiness gap in the water sector. The report draws on a pilot program that provided water and wastewater utilities with practical cybersecurity training paired with hands‑on coaching, testing whether real-world support can meaningfully improve cyber readiness.

The findings point to a clear conclusion: improving cyber resilience in the water sector is achievable when training is paired with hands-on support and delivered through trusted sector partners. Because of the success of this pilot, the program is now a permanent offering, giving water utilities continued access to practical training and support to strengthen cyber resilience and better protect their communities from evolving threats.

Why cyber resilience in the water sector matters now

Water and wastewater utilities underpin public health, economic activity, and community resilience across all critical infrastructure. Yet recent assessments from the U.S. intelligence community and public reporting on cyber incidents underscore how exposed many systems remain. Even larger, well-resourced utilities have experienced cyber incidents, highlighting vulnerabilities that are far more pronounced among smaller operators serving rural and underserved communities.

Awareness of cyber risk is growing, but awareness is not preparedness. The challenge is how to move from growing awareness to sustained, operational readiness, especially for utilities with limited time, funding, and technical capacity.

What the pilot set out to test and what it showed

The CRI pilot was designed to answer a practical question facing the water sector: can accessible, behavior‑focused cybersecurity training paired with hands‑on support meaningfully improve cyber readiness?

Participating utilities used CRI’s free Cyber Readiness Program, which focuses on core cybersecurity practices such as strong authentication, software updates, phishing awareness, and secure data handling. Utilities also had access to CRI Certified Cyber Coaches, who worked directly with designated “Cyber Leaders” inside utilities to help translate training into policies, playbooks, and incident response planning. This model paired accessible training with personalized support to help utilities make meaningful progress despite resource constraints. The pilot revealed three clear findings about what helps and what limits cyber readiness in the water sector.

• CRI program improves readiness: Participating utilities reported stronger cybersecurity fundamentals, greater confidence responding to incidents, and the identification of previously undocumented, yet critical, gaps such as missing continuity plans and weak password practices.
• Hands-on support accelerates success: Utilities paired with a CRI‑certified coach were significantly more likely to complete the program than those participating on a self‑paced basis.
• Demand exceeds capacity: While interest in cybersecurity support is high, staffing shortages, limited funding, and dependence on third-party vendors continue to limit utilities’ ability to fully implement improvements. Participation data helps explain this finding: of the 113 utilities that expressed initial interest, 72 began the program and 43 completed it.

Implications for policymakers and the ecosystem

The findings point to a central takeaway for policymakers and the ecosystem: improving cybersecurity outcomes requires moving beyond sharing information to providing hands-on support that helps utilities implement and sustain change.

• Free resources are necessary but not enough: No-cost guidance alone cannot overcome staffing and funding constraints. Effective programs must include implementation support, like cyber coaches, to drive real outcomes.
• Incentives increase participation: Tying cybersecurity training to operator licensing or continuing education requirements helps embed cyber readiness into routine professional development.
• Trusted messengers drive engagement: Participation and completion were highest when programs were facilitated through established sector associations and networks that utilities already trust.

A path forward through collaboration

The lesson from this pilot is clear: cyber readiness improves when training is paired with hands‑on support and facilitated through trusted partners. But the findings also underscore a broader reality: lasting progress will require moving beyond information sharing toward approaches that build real, sustained capacity building on the ground.

At Microsoft, this work reflects a practical commitment to supporting cyber resilience across critical infrastructure, helping to move from awareness to action. Addressing the challenges identified in this report will require continued collaboration among policymakers, sector associations, nonprofits, and the private sector.

This work also complements Microsoft’s broader commitment to be water positive, including minimizing our water use and replenishing more water than we consume[1][2], by helping strengthen the resilience of the water systems and utilities that serve communities. Supporting practical cyber readiness is one way we can contribute to more resilient water systems for the future.

[1] Sustainability | Microsoft

[2] Building Community-First AI Infrastructure – Microsoft On the Issues

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In 80% of the cyber incidents Microsoft’s security teams investigated last year, attackers sought to steal data—a trend driven more by financial gain than intelligence gathering. According to the latest Microsoft Digital Defense Report, written with our Chief Information Security Officer Igor Tsyganskiy, over half of cyberattacks with known motives were driven by extortion or ransomware. That’s at least 52% of incidents fueled by financial gain, while attacks focused solely on espionage made up just 4%. Nation-state threats remain a serious and persistent threat, but most of the immediate attacks organizations face today come from opportunistic criminals looking to make a profit.

Every day, Microsoft processes more than 100 trillion signals, blocks approximately 4.5 million new malware attempts, analyzes 38 million identity risk detections, and screens 5 billion emails for malware and phishing. Advances in automation and readily available off-the-shelf tools have enabled cybercriminals—even those with limited technical expertise—to expand their operations significantly. The use of AI has further added to this trend with cybercriminals accelerating malware development and creating more realistic synthetic content, enhancing the efficiency of activities such as phishing and ransomware attacks. As a result, opportunistic malicious actors now target everyone—big or small—making cybercrime a universal, ever-present threat that spills into our daily lives.

In this environment, organizational leaders must treat cybersecurity as a core strategic priority—not just an IT issue—and build resilience into their technology and operations from the ground up. In our sixth annual Microsoft Digital Defense Report, which covers trends from July 2024 through June 2025, we highlight that legacy security measures are no longer enough; we need modern defenses leveraging AI and strong collaboration across industries and governments to keep pace with the threat. For individuals, simple steps like using strong security tools—especially phishing-resistant multifactor authentication (MFA)—makes a big difference, as MFA can block over 99% of identity-based attacks. Below are some of the key findings.

Critical services are prime targets with a real-world impact

Malicious actors remain focused on attacking critical public services—targets that, when compromised, can have a direct and immediate impact on people’s lives. Hospitals and local governments, for example, are all targets because they store sensitive data or have tight cybersecurity budgets with limited incident response capabilities, often resulting in outdated software. In the past year, cyberattacks on these sectors had real-world consequences, including delayed emergency medical care, disrupted emergency services, canceled school classes, and halted transportation systems.

Ransomware actors in particular focus on these critical sectors because of the targets’ limited options. For example, a hospital must quickly resolve its encrypted systems, or patients could die, potentially leaving no other recourse but to pay. Additionally, governments, hospitals, and research institutions store sensitive data that criminals can steal and monetize through illicit marketplaces on the dark web, fueling downstream criminal activity. Government and industry can collaborate to strengthen cybersecurity in these sectors—particularly for the most vulnerable. These efforts are critical to protecting communities and ensuring continuity of care, education, and emergency response.

Nation-state actors are expanding operations

While cybercriminals are the biggest cyber threat by volume, nation-state actors still target key industries and regions, expanding their focus on espionage and, in some cases, on financial gain. Geopolitical objectives continue to drive a surge in state-sponsored cyber activity, with a notable expansion in targeting communications, research, and academia.

Key insights:

• China is continuing its broad push across industries to conduct espionage and steal sensitive data. State-affiliated actors are increasingly attacking non-governmental organizations (NGOs) to expand their insights and are using covert networks and vulnerable internet-facing devices to gain entry and avoid detection. They have also become faster at operationalizing newly disclosed vulnerabilities.
• Iran is going after a wider range of targets than ever before, from the Middle East to North America, as part of broadening espionage operations. Recently, three Iranian state-affiliated actors attacked shipping and logistics firms in Europe and the Persian Gulf to gain ongoing access to sensitive commercial data, raising the possibility that Iran may be pre-positioning to have the ability to interfere with commercial shipping operations.
• Russia, while still focused on the war in Ukraine, has expanded its targets. For example, Microsoft has observed Russian state-affiliated actors targeting small businesses in countries supporting Ukraine. In fact, outside of Ukraine, the top ten countries most affected by Russian cyber activity all belong to the North Atlantic Treaty Organization (NATO)—a 25% increase compared to last year. Russian actors may view these smaller companies as possibly less resource-intensive pivot points they can use to access larger organizations. These actors are also increasingly leveraging the cybercriminal ecosystem for their attacks.
• North Korea remains focused on revenue generation and espionage. In a trend that has gained significant attention, thousands of state-affiliated North Korean remote IT workers have applied for jobs with companies around the world, sending their salaries back to the government as remittances. When discovered, some of these workers have turned to extortion as another approach to bringing in money for the regime.

The cyber threats posed by nation-states are becoming more expansive and unpredictable. In addition, the shift by at least some nation-state actors to further leveraging the cybercriminal ecosystem will make attribution even more complicated. This underscores the need for organizations to stay abreast of the threats to their industries and work with both industry peers and governments to confront the threats posed by nation-state actors.

2025 saw an escalation in the use of AI by both attackers and defenders

Over the past year, both attackers and defenders harnessed the power of generative AI. Threat actors are using AI to boost their attacks by automating phishing, scaling social engineering, creating synthetic media, finding vulnerabilities faster, and creating malware that can adapt itself. Nation-state actors, too, have continued to incorporate AI into their cyber influence operations. This activity has picked up in the past six months as actors use the technology to make their efforts more advanced, scalable, and targeted.

For defenders, AI is also proving to be a valuable tool. Microsoft, for example, uses AI to spot threats, close detection gaps, catch phishing attempts, and protect vulnerable users. As both the risks and opportunities of AI rapidly evolve, organizations must prioritize securing their AI tools and training their teams. Everyone—from industry to government—must be proactive to keep pace with increasingly sophisticated attackers and to ensure that defenders keep ahead of adversaries.

Adversaries aren’t breaking in; they’re signing in

Amid the growing sophistication of cyber threats, one statistic stands out: more than 97% of identity attacks are password attacks. In the first half of 2025 alone, identity-based attacks surged by 32%. That means the vast majority of malicious sign-in attempts an organization might receive are via large-scale password guessing attempts. Attackers get usernames and passwords (“credentials”) for these bulk attacks largely from credential leaks.

However, credential leaks aren’t the only place where attackers can obtain credentials. This year, we saw a surge in the use of infostealer malware by cybercriminals. Infostealers can secretly gather credentials and information about your online accounts, like browser session tokens, at scale. Cybercriminals can then buy this stolen information on cybercrime forums, making it easy for anyone to access accounts for purposes such as the delivery of ransomware.

Luckily, the solution to identity compromise is simple. The implementation of phishing-resistant multifactor authentication (MFA) can stop over 99% of this type of attack even if the attacker has the correct username and password combination. To target the malicious supply chain, Microsoft’s Digital Crimes Unit (DCU) is fighting back against the cybercriminal use of infostealers. In May, the DCU disrupted the most popular infostealer—Lumma Stealer—alongside the US Department of Justice and Europol.

Moving forward: Cybersecurity is a shared defensive priority

As threat actors grow more sophisticated, persistent, and opportunistic, organizations must stay vigilant, continually updating their defenses and sharing intelligence. Microsoft remains committed to doing its part to strengthen our products and services via our Secure Future Initiative. We also continue to collaborate with others to track threats, alert targeted customers, and share insights with the broader public when appropriate.

However, security is not only a technical challenge but a governance imperative. Defensive measures alone are not enough to deter nation-state adversaries. Governments must build frameworks that signal credible and proportionate consequences for malicious activity that violates international rules. Encouragingly, governments are increasingly attributing cyberattacks to foreign actors and imposing consequences such as indictments and sanctions. This growing transparency and accountability are important steps toward building collective deterrence. As digital transformation accelerates—amplified by the rise of AI—cyber threats pose risks to economic stability, governance, and personal safety. Addressing these challenges requires not only technical innovation but coordinated societal action.

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