CVE-2026-26133: M365 Copilot Information Disclosure Vulnerability
Description
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Vector 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 · CWE-77
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Microsoft: Microsoft 365 Copilot for AndroidMicrosoft: Microsoft 365 Copilot for iOSMicrosoft: Microsoft Edge for AndroidMicrosoft: Microsoft Edge for iOSMicrosoft: Microsoft Excel for AndroidMicrosoft: Microsoft Excel for iOSMicrosoft: Microsoft Loop for iOSMicrosoft: Microsoft OneNoteMicrosoft: Microsoft OneNote for AndroidMicrosoft: Microsoft Outlook for AndroidMicrosoft: Microsoft Outlook for iOSMicrosoft: Microsoft Outlook for MacMicrosoft: Microsoft PowerBI for AndroidMicrosoft: Microsoft PowerBI for iOSMicrosoft: Microsoft PowerPoint for AndroidMicrosoft: Microsoft PowerPoint for iOSMicrosoft: Microsoft Teams for AndroidMicrosoft: Microsoft Teams for iOSMicrosoft: Microsoft Word for AndroidMicrosoft: Microsoft Word for iOS
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)