#6
The Hacker News
general
November 12, 2026 at 17:50 UTC
New SignDrop Zero-Day Exploit Turns Windows CLFS Security Feature Into SYSTEM Access
By [email protected] (The Hacker News)
AI Summary
A disgruntled researcher publicly released 'SignDrop,' a proof-of-concept exploit targeting Windows' Common Log File System (CLFS) driver that abuses a log-authentication feature added last year to escalate local privileges to SYSTEM via arbitrary file creation in the Windows Defender antimalware process context. No patch is currently available as Microsoft was not given advance notice. Blue teams should monitor for CLFS driver abuse and unusual file creation activity in antimalware process directories.
Relevance score: 85.0/100
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