CVE-2026-59118
Copilot Cowork Elevation of Privilege Vulnerability
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Copilot Cowork Elevation of Privilege Vulnerability
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-59118- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-285
- Updated
- 2026-11-02
EUVDEUVD-2026-54314
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
- Record
EUVD-2026-54314- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jc2g-2frr-2pxq
Improper authorization in Microsoft Power Apps allows an unauthorized attacker to elevate...
Improper authorization in Microsoft Power Apps allows an unauthorized attacker to elevate privileges over a network.
- Record
GHSA-jc2g-2frr-2pxq- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-285
- Updated
- 2026-11-02
NVD
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-59118- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-285
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-59118 is a critical vulnerability (CVSS 9.3) in Microsoft Copilot Cowork, published August 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 53rd percentile. No source names a fixed version.