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Microsoft Security Response CenterCVE-2026-33102

Microsoft 365 Copilot Elevation of Privilege Vulnerability

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

Read the vendor bulletin Get alerts for Microsoft 365 Copilot
9.3CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Microsoft 365 Copilot
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-33102View CVSS, KEV, EPSS, and threat context
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