#Windows Defender
All CosmicBytez Labs articles tagged #Windows Defender, across news, security advisories, how-to guides, and projects.
- News
New Windows Defender Zero-Day Blocks Microsoft Antivirus Updates
Researcher Abdelhamid Naceri released BigDiskBuster, a zero-day that freezes Windows Defender signature and platform updates indefinitely.
- Newsletter
Weekly Digest — Issue #36
Arista's VeloCloud takes a CVSS 10.0 under active attack, a Microsoft 'spoofing' bug turns out to be real RCE, and China loots government data.
- News
Microsoft Asks Users to Ignore False 'Antivirus Is Turned Off' Errors
Microsoft confirms a Defender bug shows false "antivirus is off" alerts on Windows 11 26H1 and Server 2025 — protection is unaffected, fix pending.
- News
Microsoft Reins in RoguePlanet Zero-Day After Public PoC Release
Researcher 'Nightmare-Eclipse' published a proof-of-concept exploit for a Windows Defender vulnerability in early June after dropping several other...
- News
Microsoft Working on Defender Patch for RoguePlanet Zero-Day
Microsoft has confirmed it is developing a security patch for the RoguePlanet zero-day vulnerability in Windows Defender, disclosed publicly last week,...
- News
Microsoft Warns of Two Actively Exploited Defender
Microsoft has disclosed two Windows Defender vulnerabilities under active exploitation in the wild, including CVE-2026-41091 — a privilege escalation flaw...
- News
Microsoft Warns of New Defender Zero-Days Exploited in Attacks
Microsoft has issued emergency patches for two Windows Defender vulnerabilities that were actively exploited as zero-days before fixes were available....
- News
Three Microsoft Defender Zero-Days Actively Exploited; Two
Huntress is warning that threat actors are actively exploiting three privilege escalation vulnerabilities in Microsoft Defender — codenamed BlueHammer,...