What is CVE-2026-59118?

CVE-2026-59118 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Copilot Cowork Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-59118 cover?

CVE-2026-59118 covers the following CVE IDs: CVE-2026-59118. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-59118?

CVE-2026-59118 has a CVSS v3 base score of 9.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-59118?

CVE-2026-59118 affects 1 product, including: Copilot Cowork.

CVE-2026-59118CriticalCVSS 9.3

Copilot Cowork Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 14, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-59118 →

📋 Description

Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.

🎯 Affected products1

Copilot Cowork

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59118