# New SignDrop Zero-Day Exploit Turns Windows CLFS Security Feature Into SYSTEM Access

Source: [The Hacker News](https://thehackernews.com/2026/11/new-signdrop-zero-day-exploit-turns.html) · 2026-11-12 · Security
Page: https://themorning.dev/story/new-signdrop-zero-day-exploit-turns-windows-clfs-security-feature-into-system-ac-1acaa8e77a2e5854
Kind: security · Impact: high

## In brief

- Security researcher Abdelhamid Naceri (also known as Nightmare Eclipse) released a new Windows zero-day exploit called SignDrop.
- The exploit can let attackers gain SYSTEM privileges on Windows.

## Why it matters

A public zero-day that grants SYSTEM privileges lets an attacker who already has some access take full control of a Windows machine, so Windows teams should watch for a fix.

## Coverage

- [New SignDrop Zero-Day Exploit Turns Windows CLFS Security Feature Into SYSTEM Access](https://thehackernews.com/2026/11/new-signdrop-zero-day-exploit-turns.html) — The Hacker News, 2026-11-12
- [New Windows SignDrop zero-day gives hackers SYSTEM privileges](https://www.bleepingcomputer.com/news/security/new-windows-signdrop-zero-day-gives-hackers-system-privileges/) — BleepingComputer, 2026-11-12

Tags: windows, zero-day, privilege-escalation, security, exploit

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev