Tag Archives: microsoft defender
Microsoft Defender Zero-Days: Active Exploitation of RedSun and UnDefend Flaws
Security researchers and CSIRT-ITA warn of the active exploitation of two unpatched Microsoft Defender zero-days, codenamed RedSun and UnDefend, which allow attackers to bypass security updates and gain SYSTEM-level access. Continue reading
Microsoft Defender Zero-Day: BlueHammer (CVE-2026-33825) Under Active Exploitation
A critical Microsoft Defender Zero-Day, known as BlueHammer, is being actively exploited via a TOCTOU race condition to grant attackers SYSTEM-level privileges. Continue reading
Microsoft Defender Zero-Day Vulnerabilities RedSun and UnDefend Exploited
Security researchers confirm the active exploitation of two unpatched Microsoft Defender zero-day vulnerabilities, known as RedSun and UnDefend, which allow attackers to gain SYSTEM privileges. Continue reading
Microsoft Defender Zero-Days: RedSun and UnDefend Exploited
Security researchers have confirmed the active exploitation of two unpatched Microsoft Defender zero-days, dubbed RedSun and UnDefend, which allow for privilege escalation and update suppression. Continue reading
Microsoft Defender RedSun Zero-Day Vulnerability Discovered
A new Microsoft Defender RedSun zero-day vulnerability allows full SYSTEM-level privilege escalation on Windows 11 and Windows Server 2025 despite recent patches. Continue reading