ReviewCritical
CVE-2026-59118
Microsoft Copilot Cowork, power apps
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
- CVSS
- 9.3
- EPSS
- - - percentile
- CISA KEV
- Not listed
- Published
- 2026.08.07
Review
The CVSS severity warrants an early asset and exposure review.
Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.3
Vulnerability overview
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
Affected product and versions
- Product
- Microsoft Copilot Cowork, power apps
- Affected versions
- See the vendor advisory and NVD configuration data
- Fixed versions
- No verified fixed-version field is available yet
Recommended response sequence
Confirm exposure before applying a vendor-supported change.
- 1Identify
Confirm that Microsoft Copilot Cowork, power apps and an affected version are present.
- 2Prioritize
Combine exploitation signals with asset exposure and business criticality.
- 3Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
- 4Verify
Recheck the version, service health, access paths, and relevant logs.
Technical data
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- CWE
- CWE-285