Attackers are increasingly abusing Microsoft’s decades-old MSHTA utility to stealthily deliver stealers, loaders, and persistent malware through phishing, fake software downloads, and LOLBIN-based attack chains.

The post Legacy Windows Tool MSHTA Fuels Surge in Silent Malware Attacks appeared first on SecurityWeek.

Patched in April, the underlying vulnerability allows local attackers to elevate their privileges to root.

The post PoC Released for DirtyDecrypt Linux Kernel Vulnerability appeared first on SecurityWeek.

Data breach notification letters have become a familiar routine. They usually start with “We value your privacy” and offer a year of free credit monitoring. But the most important part is often hidden in the middle:

A list of what actually got out.

A leaked email address is not a leaked admin password. A hashed credential is not a session token. There is no universal post-breach checklist. The right response depends on the data exposed, so read the notice carefully and match your response to the level of exposure.

Continue reading What to Do When a Third-Party Data Breach Puts Your Website at Risk at Sucuri Blog.

The UK’s AI Security Institute evaluated GPT-5.5’s ability to find security vulnerabilities, and found that it is comparable to Claude Mythos. Note that the OpenAI model is generally available.

Here is the Institute’s evaluation of Mythos.

And here is an analysis of a smaller, cheaper model. It requires more scaffolding from the prompter, but it is also just as good.