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Semperis Warns of Flaw in Windows Server 2025 Delegated Managed Service AccountsA critical cryptographic flaw in Windows Server 2025's delegated Managed Service Accounts, or dMSAs, allows attackers to generate passwords for every managed service account across an Active Directory forest and create a backdoor, Semperis researchers found.

For many organizations, Active Directory (AD) service accounts are quiet afterthoughts, persisting in the background long after their original purpose has been forgotten. To make matters worse, these orphaned service accounts (created for legacy applications, scheduled tasks, automation scripts, or test environments) are often left active with non-expiring or stale passwords

Semperis CEO Mickey Bresman: AD’s Technical Debt Makes It a Prime Cyber TargetFrom weak service account passwords to sync gaps with cloud platforms, Active Directory’s age is showing. Semperis CEO Mickey Bresman says organizations still underestimate how central AD is to their threat landscape - and the difficulty of fixing what’s been built over decades.