The Play ransomware gang exploited a Windows Common Log File System flaw in zero-day attacks to deploy malware, gaining SYSTEM privileges on compromised systems.
The vulnerability, CVE-2025-29824, allowed attackers to elevate privileges locally, leading to confirmed exploits in the wild by the Play ransomware gang.
Microsoft addressed the flaw in April's Patch Tuesday security updates, after it was added to the Known Exploited Vulnerabilities catalog by CISA.
The exploit was used by multiple threat actors before being patched, with connections to malware like PipeMagic and Storm-2460, used by Balloonfly cybercrime group.