PoC Exploit Released for Windows Disk Cleanup Tool Elevation of Privilege Vulnerability


A proof-of-concept exploit published for CVE-2025-21420, a newly discovered elevation of privilege vulnerability affecting the Windows Disk Cleanup Tool (cleanmgr.exe). The vulnerability allows attackers to escalate privileges to SYSTEM level by exploiting improper link resolution mechanisms within the SilentCleanup scheduled task, which runs with elevated privileges on Windows systems.

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