Disclosure summary
Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
Source-reported weakness categories
CWE-601
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Apr
Open original source · Updated Apr 23, 2026
Microsoft 365 Copilot Elevation of Privilege Vulnerability
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 9.3
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | Microsoft 365 Copilot | (MSRC status code 3) |
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-04-23T03:00:00-04:00
MODIFIED 2026-04-23T03:00:00-04:00
INGESTED 2026-10-08T12:45:05-04:00