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CVE-2026-33102 - Vulnerability Analysis

CriticalCVSS: 9.3

Last Updated: April 23, 2026

M365 Copilot - Open Redirect

Published: April 23, 2026Updated: April 23, 2026Remote Exploitable

Overview

M365 Copilot contains an open redirect vulnerability caused by improper URL validation, letting unauthorized attackers elevate privileges over a network, exploit requires crafted URL redirection.

Severity & Score

Severity: Critical

CVSS Score: 9.3

Impact

Attackers can elevate privileges over a network by exploiting URL redirection to untrusted sites.

Mitigation

Update to the latest version of M365 Copilot.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33102

Related Resources

Vulnerability Intelligence Dashboard
Credential Scanner

Details

CVE ID: CVE-2026-33102
Severity: Critical
CVSS Score: 9.3
Type: open_redirect
Status: new

CWE

CWE-601

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N