CVE-2026-56191
Critical · CVSS 10.0- CVSS
- 10.0
- nvd
- EPSS
- 0.68%
- 49th pct
- KEV
- No
- Class
- other
- CWE-287
Description
Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.
References
Status: profiled · ingested 2026-07-29T18:00:00.000Z