CVE-2026-54998 | Microsoft Exchange Online authorization

A vulnerability classified as very critical has been found in Microsoft Exchange Online. This impacts an unknown function. Performing a manipulation results in incorrect authorization.

This vulnerability is identified as CVE-2026-54998. The attack can be initiated remotely. There is not any exploit available.

This product is a managed service. It is not possible for users to maintain vulnerability countermeasures themselves.VulDB Recent EntriesRead More