Tag

RedSun

2 stories
Recently Leaked Windows Zero-Days Now Being Actively Exploited: What You Need to Know

Recently Leaked Windows Zero-Days Now Being Actively Exploited: What You Need to Know

Threat actors have begun abusing three recently disclosed Windows vulnerabilities to escalate privileges and interfere with Microsoft Defender, shifting a theoretical disclosure debate into a real-world security crisis. A security researcher known as “Chaotic Eclipse” (also called “Nightmare-Eclipse”) released proof-of-concept exploit code for all three flaws earlier this month, and multiple security teams have since observed the techniques used in live intrusions. For defenders and administrators, the situation underscores how…

Saugata Datta4 min read243
RedSun: New Microsoft Defender Zero-Day Lets Unprivileged Users Gain SYSTEM Access

RedSun: New Microsoft Defender Zero-Day Lets Unprivileged Users Gain SYSTEM Access

A freshly disclosed zero-day vulnerability in Microsoft Defender, dubbed "RedSun," has raised alarms across enterprise security teams: an unprivileged user can escalate to full SYSTEM-level access on fully patched Windows systems. The flaw was detailed publicly in April 2026 by a researcher known as "Chaotic Eclipse" (also referenced as Nightmare‑Eclipse on GitHub). Independent verification from vulnerability analyst Will Dormann confirms the exploit works reliably on current Windows releases, and as…

Saugata Datta4 min read242
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