CVE-2026-26133
M365 Copilot Information Disclosure Vulnerability
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information 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
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
M365 Copilot Information Disclosure Vulnerability
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
- Record
CVE-2026-26133- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C - Weakness
- CWE-77
- Updated
- 2026-11-02
EUVDEUVD-2026-12111
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
- Record
EUVD-2026-12111- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rjf5-cxrf-4rvw
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over...
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
- Record
GHSA-rjf5-cxrf-4rvw- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N - Weakness
- CWE-77
- Updated
- 2026-11-02
NVD
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
- Record
CVE-2026-26133- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N - Weakness
- CWE-77
- Updated
- 2026-11-02
Affected products
- microsoft 365 copilot
- microsoft edge
- microsoft excel
- microsoft loop
- microsoft 365 copilot for android
- microsoft 365 copilot for ios
- microsoft edge for android
- microsoft edge for ios
- microsoft excel for android
- microsoft excel for ios
- microsoft loop for ios
- microsoft onenote
Show 17 moreShow less
- microsoft onenote for android
- microsoft outlook for android
- microsoft outlook for ios
- microsoft outlook for mac
- microsoft powerbi for android
- microsoft powerbi for ios
- microsoft powerpoint for android
- microsoft powerpoint for ios
- microsoft teams for android
- microsoft teams for ios
- microsoft word for android
- microsoft word for ios
- microsoft outlook
- microsoft power bi
- microsoft powerpoint
- microsoft teams
- microsoft word
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-2026-26133 is a high vulnerability (CVSS 7.1) in Microsoft 365 Copilot, published March 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. No source names a fixed version.