Microsoft Defender Zero-Day Vulnerabilities RedSun and UnDefend Actively Exploited ...
Source: Rescana
Published:
<p>In April 2026, two critical zero-day vulnerabilities— RedSun and UnDefend —were discovered in Microsoft Defender , the default endpoint protection suite for Windows 10 , Windows 11 , and Windows Server platforms. These vulnerabilities are being actively exploited in the wild, enabling attackers t