CVE-2026-84003 | Microsoft Authentication Library up to 5.5.x authentication replay

September 9, 2026 Yanac

A vulnerability categorized as critical has been discovered in Microsoft Authentication Library up to 5.5.x. Affected is an unknown function. Such manipulation leads to authentication bypass by capture-replay.

This vulnerability is traded as CVE-2026-84003. The attack may be launched remotely. There is no exploit available.

It is advisable to upgrade the affected component.VulDB Recent EntriesRead More