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Description

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

PUBLISHED Reserved 2026-03-17 | Published 2026-04-23 | Updated 2026-04-28 | Assigner microsoft




CRITICAL: 9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C

Problem types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Product status

-
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33102 (Microsoft 365 Copilot Elevation of Privilege Vulnerability) vendor-advisory patch

cve.org (CVE-2026-33102)

nvd.nist.gov (CVE-2026-33102)

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