CVE-2026-59118: CWE-285: Improper Authorization in Microsoft Copilot Cowork
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-59118) in Microsoft Copilot Cowork is classified as CWE-285 (Improper Authorization). It enables an attacker without prior privileges to elevate their access rights remotely over a network. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and high impact on confidentiality and integrity. The vendor has released an official fix to address this issue.
Potential Impact
An attacker can exploit this vulnerability to gain elevated privileges remotely, compromising the confidentiality and integrity of the affected system. There is no reported impact on availability. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the vendor-provided patch promptly to remediate the improper authorization issue in Copilot Cowork.
CVE-2026-59118: CWE-285: Improper Authorization in Microsoft Copilot Cowork
Description
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
CVSS v3.1
Score 9.3critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-59118) in Microsoft Copilot Cowork is classified as CWE-285 (Improper Authorization). It enables an attacker without prior privileges to elevate their access rights remotely over a network. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and high impact on confidentiality and integrity. The vendor has released an official fix to address this issue.
Potential Impact
An attacker can exploit this vulnerability to gain elevated privileges remotely, compromising the confidentiality and integrity of the affected system. There is no reported impact on availability. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the vendor-provided patch promptly to remediate the improper authorization issue in Copilot Cowork.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jc2g-2frr-2pxq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-59118"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- Remediation Level
- official-fix
- State
- PUBLISHED
Threat ID: 6a75739abf8831d539d91b0a
Added to database: 08/07/2026, 05:56:42 UTC
Last enriched: 08/15/2026, 18:09:02 UTC
Last updated: 09/21/2026, 22:01:35 UTC
Views: 40
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