Microsoft has embedded Anthropic’s Claude Mythos Preview into its Security Development Lifecycle. The AI has already found thousands of zero-day vulnerabilities including a 27-year-old OpenBSD flaw.
Anthropic Claude Mythos Preview found 271 security vulnerabilities in Mozilla Firefox in a single evaluation pass. All bugs are patched in Firefox 150. Here is the full breakdown.
A small group of unauthorized users accessed Anthropic’s Mythos AI — the cybersecurity model deemed too dangerous to release publicly — by exploiting a third-party contractor’s credentials. Anthropic is now investigating. Here’s the full breakdown of how it happened, who they are, and why this could be the most dangerous AI breach yet.
The Interlock ransomware group exploited a Cisco Firewall Management Center zero-day as an initial access vector. Here’s how the attack worked and how to protect your network.
Microsoft’s Zero Day Quest 2026 concluded with $2.3 million in payouts — the largest in program history — for critical vulnerabilities in Azure AI, Copilot, and Windows kernel.
Apple disclosed its first actively exploited zero-day of 2026, CVE-2026-20700, affecting iOS, iPadOS, and macOS. Update to iOS 19.3.2 and macOS 15.3.2 immediately.
Adobe released an emergency patch for CVE-2026-34621, a critical Acrobat Reader flaw with CVSS 8.6 that has been under active exploitation since at least December 2025.
A security researcher released three Microsoft Defender vulnerabilities after a CVD dispute. Here’s what BlueHammer, RedSun, and UnDefend do and how to protect yourself now.
Microsoft’s April 2026 Patch Tuesday addresses 168 CVEs including an actively exploited SharePoint Server zero-day and eight Critical-rated remote code execution flaws.