Microsoft Defender “RedSun” Zero-Day (CVE-2026-33825): Unpatched Exploit Grants Full SYSTEM Access
An unpatched zero-day dubbed RedSun (CVE-2026-33825) actively exploits a flaw in Windows Defender's cloud file rollback mechanism to grant attackers full SYSTEM privileges. A public PoC has been...
Windows Defender Triple Zero-Day: BlueHammer, RedSun, and UnDefend Actively Exploited in the Wild
Three critical zero-day vulnerabilities — BlueHammer (CVE-2026-33825), RedSun, and UnDefend — have been discovered in Windows Defender's remediation engine. All three allow local privilege escalation to SYSTEM level...
Three Windows Defender Zero-Days Exploited in the Wild: BlueHammer Patched, RedSun and UnDefend Still Unpatched
A security researcher dropped three Windows Defender zero-day exploits in 13 days — BlueHammer (CVE-2026-33825), RedSun, and UnDefend. All three are now confirmed active in live attacks, with...
Microsoft April 2026 Patch Tuesday: Actively Exploited SharePoint Zero-Day Among 167 Fixes
Microsoft's April 2026 Patch Tuesday patches 167 vulnerabilities including an actively exploited SharePoint Server zero-day (CVE-2026-32201) and a publicly disclosed Windows Defender race condition (CVE-2026-33825). Security teams should...
Microsoft April 2026 Patch Tuesday: 163 CVEs Including Two Zero-Days and a Public “BlueHammer” Exploit
Microsoft's April 2026 Patch Tuesday addresses 163 CVEs, including an actively exploited SharePoint spoofing zero-day (CVE-2026-32201) and a publicly leaked Defender EoP exploit dubbed "BlueHammer" (CVE-2026-33825). A critical...