What is GHSA-m9fr-m5pc-g6ww?

GHSA-m9fr-m5pc-g6ww is a security advisory published by GitHub Security Advisories with High severity. Improper access control in Windows Cross Device Service allows an authorized attacker to elevate...

Which CVE IDs does GHSA-m9fr-m5pc-g6ww cover?

GHSA-m9fr-m5pc-g6ww covers the following CVE IDs: CVE-2026-66804. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-m9fr-m5pc-g6ww?

GHSA-m9fr-m5pc-g6ww has a CVSS v3 base score of 7.8, published by GitHub Security Advisories.

GHSA-m9fr-m5pc-g6wwHighCVSS 7.8

Improper access control in Windows Cross Device Service allows an authorized attacker to elevate...

Vendor

GitHub Security Advisories

Published

August 11, 2026

Last Modified

August 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-66804 →

📋 Description

Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-66804
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804
https://github.com/advisories/GHSA-m9fr-m5pc-g6ww