Microsoft addressed a high-severity elevation of privilege vulnerability (CVE-2025-21420) in its Windows Disk Cleanup Utility (cleanmgr.exe) during February 2025’s Patch Tuesday. The flaw, scoring 7.8 on the CVSS scale, enabled attackers to execute malicious code with SYSTEM privileges through DLL sideloading and a directory traversal technique. Technical Analysis of CVE-2025-21420 The vulnerability stems from cleanmgr.exe’s […]
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