How to Secure Windows Defender Against the BlueHammer Vulnerability
In April 2026, a critical vulnerability in Windows Defender, known as BlueHammer (CVE-2026-33825), was disclosed. This flaw allows attackers to escalate privileges to SYSTEM level, potentially granting full control over affected systems. Despite Microsoft releasing a patch on April 14, 2026, the vulnerability continues to be actively exploited in ransomware campaigns.
