CVE-2026-33825

Microsoft has disclosed that a privilege escalation and a denial-of-service flaw in Defender has come under active exploitation in the wild. The former, tracked as CVE-2026-41091, is rated 7.8 on the CVSS scoring system. Successful exploitation of the flaw could allow an attacker to gain SYSTEM privileges. "Improper link resolution before file access ('link following') in Microsoft Defender

Microsoft has come out strongly in favor of Coordinated Vulnerability Disclosure (CVD), urging the research community to share their findings and give affected vendors an opportunity to better understand the impact and address them before they are publicly disclosed. The development comes after a researcher named Chaotic Eclipse (aka Nightmare-Eclipse) disclosed details of multiple zero-day

Der YellowKey-Exploit hebelt BitLocker über die Windows-Wiederherstel­lungs­umgebung aus und ermöglicht Klartext-Zugriff auf verschlüsselte Laufwerke mit USB-Stick und Neustart. Microsoft führt die Lücke unter CVE-2026-45585, ein Patch steht noch aus. Als sofortige Schutzmaßnahme empfiehlt Microsoft TPM+PIN sowie ein PowerShell-Skript zur Bereinigung des WinRE-Images.

Microsoft has patched two zero-day flaws and over 160 others