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CVE-2025-32706 is a local elevation-of-privilege vulnerability in the Windows Common Log File System (CLFS) driver, including the clfs.sys component. The flaw is caused by improper input validation when processing attacker-controlled CLFS log data. An authorized local attacker can exploit the weakness by crafting or modifying CLFS log files so that the driver mishandles the supplied input, resulting in privilege escalation. Microsoft reported the vulnerability as actively exploited in the wild at the time of disclosure, and exploitation has been associated with post-compromise activity in which attackers use the bug to obtain SYSTEM-level execution on affected Windows systems.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
31 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows CLFS driver elevation of privilege vulnerability reported as exploited and included in CISA KEV.
An elevation of privilege vulnerability in the Windows Common Log File System Driver (CLFS). It is one of the CLFS flaws explicitly stated to be under active exploitation in the wild.
Elevation of privilege vulnerability in Windows Common Log File System (CLFS).
A privilege escalation vulnerability in the Windows Common Log File System, highlighted as potentially important because this subsystem is regularly abused in real-world attacks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.