MEDIUM 6.5 Microsoft

CVE-2026-42827

M365 Copilot Information Disclosure Vulnerability

Microsoft Security Update 2026-May: M365 Copilot Information Disclosure Vulnerability

Affected Products

Microsoft 365 Copilot

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42827
https://nvd.nist.gov/vuln/detail/CVE-2026-42827

Published: 2026-05-12 · Source: Microsoft · Feed updated: 2026-08-04

This medium severity vulnerability with a CVSS score of 6.5 was published on 2026-05-12 via Microsoft. Affected: Microsoft 365 Copilot.

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