Published Nov 12, 2026, 12:50 PM ET · Updated 4 hours ago · 2 sources
New SignDrop Zero-Day Exploit Turns Windows CLFS Security Feature Into SYSTEM Access
The Hacker News
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Original Report
INFERY
Public exploit code released earlier this week claims that a local Windows user can gain SYSTEM privileges through the Common Log File System driver. The proof of concept, called SignDrop, targets a log-authentication feature added to the driver last year. It abuses how clfs.sys creates companion files when a privileged process opens a prepared log, using path redirection to take control of