Introduction to Malware Binary Triage (IMBT) Course
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On April 7, 2026, a zero-day vulnerability in Microsoft Defender, tracked as CVE-2026-33825, was publicly disclosed alongside a working proof-of-concept exploit. The vulnerability enables local privilege escalation, allowing an unprivileged user to gain SYSTEM-level access on fully patched Windows 10 and Windows 11 systems. The exploit, referred to as "BlueHammer", was released prior to the availability of an official fix, making it a true zero-day at the time of disclosure.
Article Link: https://www.picussecurity.com/resource/blog/bluehammer-redsun-windows-defender-cve-2026-33825-zero-day-vulnerability-explained