What is GHSA-fmx2-865f-8c6j?

GHSA-fmx2-865f-8c6j is a security advisory published by GitHub Security Advisories with High severity. Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to...

Which CVE IDs does GHSA-fmx2-865f-8c6j cover?

GHSA-fmx2-865f-8c6j covers the following CVE IDs: CVE-2026-66307. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-fmx2-865f-8c6j?

GHSA-fmx2-865f-8c6j has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-fmx2-865f-8c6jHighCVSS 7.5

Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to...

Vendor

GitHub Security Advisories

Published

September 8, 2026

Last Modified

September 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-66307 →

📋 Description

Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-66307
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66307
https://github.com/advisories/GHSA-fmx2-865f-8c6j