CRITICAL 9.3 Microsoft

CVE-2026-59118

Copilot Cowork Elevation of Privilege Vulnerability

Microsoft Security Update 2026-Aug: Copilot Cowork Elevation of Privilege Vulnerability

Affected Products

References

Published: 2026-08-11 · Source: Microsoft · Feed updated: 2026-11-07
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-11 via Microsoft. Affected: Copilot Cowork.

Risk Timeline

CVE Disclosed2026-08-11 · 87 days ago

Remediation Resources

Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59118
NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-59118

Related Vulnerabilities

CVETitleSeverityCVSS
CVE-2026-24301Microsoft Copilot Information Disclosure VulnerabilityHIGH8.8
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