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The Hacker News

ShieldBreak Zero-Day PoC Claims Microsoft Defender Patch Bypass With SYSTEM Access

The security researcher going by the name Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has released a proof-of-concept (PoC) for a new Microsoft zero-day called ShieldBreak. The vulnerability, rooted in Microsoft Defender for Windows, demonstrates a patch bypass for CVE-2026-50656 (CVSS score: 7.8), otherwise known as RoguePlanet. RoguePlanet has been described

CVE-2026-50656
FortiGuard PSIRT Advisories

Server-Side Request Forgery (SSRF)

CVSSv3 Score: 3.4 A Server-Side request forgery (SSRF) [CWE-918] vulnerability in FortiSIEM GUI may allow an authenticated attacker to send HTTP requests originating from the…

FortiGuard PSIRT Advisories

Stack buffer overflow in WAD

CVSSv3 Score: 5.1 A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS explicit proxy may allow an unauthenticated attacker who can bypass stack protection and AS…

FortiGuard PSIRT Advisories

UI DoS attack

CVSSv3 Score: 5.0 An Allocation of Resources Without Limits or Throttling vulnerability [CWE-770] in FortiOS may allow an unauthenticated attacker to perform a slow HTTP DoS …

Krebs on Security

Microsoft Plugs Nearly 400 Security Holes

Microsoft today released updates to remedy at least 398 security vulnerabilities in its Windows operating systems and supported software, including one weakness that is already bei…

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