What’s Vulnerable › Vulnerabilities

CVE-2026-33102: Microsoft 365 Copilot Elevation of Privilege Vulnerability

• Severity: critical (CVSS 9.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-23 · updated 2026-10-26
• Weakness: CWE-601

Description

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

Affected products

• Microsoft 365 Copilot: all versions
• Microsoft 365 Copilot: all versions

References

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

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