Open Redirect Vulnerability in Microsoft 365 Copilot by Microsoft
CVE-2026-33102

9.3CRITICAL

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Copilot
Vendor
CVE Published:
23 April 2026

What is CVE-2026-33102?

An open redirect vulnerability in Microsoft 365 Copilot could allow unauthorized attackers to redirect users to untrusted sites, potentially leading to privilege escalation over a network. This security flaw poses risks to data integrity and user security, necessitating prompt attention and remediation.

Affected Version(s)

Microsoft 365 Copilot -

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.