CVE-2026-41106Critical
Microsoft 365 Copilot Elevation of Privilege Vulnerability
Assessment
Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
- Severity
- Critical
- CVSS base score
- 9.3CVSS:3.1/
AV:N/ AC:L/ PR:N/ UI:R/ S:C/ C:H/ I:H/ A:N/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- 0.7%Higher than 51.9% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Not assessed
- Publicly disclosed
- No
- Customer action
- Not required (service-side fix)
- Component
- M365 Copilot
- Weakness
- CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
- Issued by
- Microsoft
- Published
- 2 Jul 2026 · July 2026
- Last revised
- 2 Jul 2026
Updates that fix it
0 KBsNo KB listed
MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.
Affected products
Apps1 affected product
- Microsoft 365 Copilot