CVE-2026-66804

Fix

Public exploits 4

• CypherHippie/CVE-2026-66804 PoC on GitHub
• DavidCarliez/CVE-2026-66804-CrossDevice-LPE PoC on GitHub
• Rat5ak/CVE-2026-66804-CrossDevice-Service-EoP PoC on GitHub
• ZeroDayVPN/CVE-2026-66804-CrossDevice-Service-EoP PoC on GitHub

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Patch, vendor advisory and mitigation references on NVD 1

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804 vendor-advisory, patch

Vendor advisories in the News 1

• ZDI-26-617: Microsoft Windows MIDI Service Incorrect Permission Assignment Local Privilege Escalation Vulnerability Zero Day Initiative: published advisories · 2026-09-08

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.