CVE-2026-66804-CrossDevice-LPE

CVE-2026-66804: Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability Proof of concept for a CrossDevice/FrameServer LPE I reported to MSRC which received CVE-2026-66804. It affects Windows 10 and Windows 11. Vulnerability Windows registers this machine-wide COM server:...

CVE-2026-66804-CrossDevice-Service-EoP

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Windows Exploitation Techniques: Dangling COM Object Registrations

Posted by James Forshaw This short blog post is about abusing a privilege escalation bug that Microsoft recently fixed in Windows, CVE-2026-66804, that I and 14 others reported. This issue is an incomplete fix for CVE-2026-50343, a bug dubbed “Dark Elevator” by Calif. The root cause of the bug wa...