About Elevation of Privilege – Windows Common Log File System Driver (CVE-2025-32701, CVE-2025-32706) vulnerabilities. When Microsoft disclosed these vulnerabilities in the May Patch Tuesday, attackers were already exploiting them in the wild. The Common Log File System (CLFS) is a general-purpose logging service that can be used by software clients running in user-mode or kernel-mode.
The impact of exploiting these vulnerabilities is identical: an attacker can gain SYSTEM privileges. Their CVSS vectors are also the same (Base Score: 7.8).
What’s the difference? Bug type: for CVE-2025-32701 it’s CWE-416: Use After Free, while for CVE-2025-32706 it’s CWE-20: Improper Input Validation. CVE-2025-32701 credits MSTIC, while CVE-2025-32706 credits Google TIG and CrowdStrike ART.
No public exploits or exploitation details yet. 🤷♂️ But these vulns are likely being used in ransomware attacks, just like the EoP in CLFS (CVE-2025-29824) from April MSPT. 😉
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