CVE-2026-56191 | Microsoft Exchange Server improper authentication

July 24, 2026 Yanac

A vulnerability was found in Microsoft Exchange Server. It has been classified as very critical. This affects an unknown part. The manipulation leads to improper authentication.

This vulnerability is referenced as CVE-2026-56191. Remote exploitation of the attack is possible. No exploit is available.

This product is provided as a managed service, meaning users do not have the ability to maintain vulnerability countermeasures themselves.VulDB Recent EntriesRead More