Microsoft Confirms Windows Servers Enter Reboot Loops Following April Patches
ID: 07a8793c-6421-5695-a781-e375a27279c8
STIX ID: report--07a8793c-6421-5695-a781-e375a27279c8
Feed Name: Cyber Press
Microsoft confirmed that the April 2026 cumulative update KB5082063 (OS Build 26100.32690) can put Windows Server domain controllers into reboot loops, risking authentication failures and service outages; the update also has known issues with BitLocker Group Policy and WSUS error reporting. The report describes affected components (Kerberos/KDC changes, Secure Boot, SMB over QUIC, WDS), notes there is no out-of-band fix at time of writing, and advises administrators to delay deployment on critical servers, ensure backups, and monitor logs.
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