HIGH 7.1 Microsoft
CVE-2026-26133
M365 Copilot Information Disclosure Vulnerability
Microsoft Security Update 2026-Mar: M365 Copilot Information Disclosure Vulnerability
Affected Products
- Microsoft OneNote for iOS
- Microsoft Outlook for Mac
- Microsoft Outlook for Android
- Microsoft 365 Copilot for iOS
- Microsoft Edge for Android
- Microsoft Teams for iOS
- Microsoft Teams for Android
- Microsoft Excel for Android
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133
- https://nvd.nist.gov/vuln/detail/CVE-2026-26133
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-03-10 via Microsoft. Affected: Microsoft OneNote for iOS, Microsoft Outlook for Mac, Microsoft Outlook for Android and 5 more.
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