What is GHSA-7w4f-8vp8-mfx4?

GHSA-7w4f-8vp8-mfx4 is a security advisory published by GitHub Security Advisories with High severity. Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

Which CVE IDs does GHSA-7w4f-8vp8-mfx4 cover?

GHSA-7w4f-8vp8-mfx4 covers the following CVE IDs: CVE-2026-87699. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-7w4f-8vp8-mfx4?

GHSA-7w4f-8vp8-mfx4 has a CVSS v3 base score of 7.8, published by GitHub Security Advisories.

GHSA-7w4f-8vp8-mfx4HighCVSS 7.8

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

Vendor

GitHub Security Advisories

Published

October 13, 2026

Last Modified

October 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-87699 →

📋 Description

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-87699
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87699
https://github.com/advisories/GHSA-7w4f-8vp8-mfx4