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Microsoft WSUS sync timeout manual mitigation

Advisory/Mitigation
First reported
Last updated
Happening score
H score 25
1 unique sources, 1 articles

Summary

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Microsoft issued a manual mitigation for WSUS servers that are hitting sync timeouts and failing to return to normal update deployment. The guidance is aimed at administrators running affected Windows Server Update Services deployments so they can restore Windows Update scans and synchronization. Microsoft also said a service-side mitigation already restored normal behavior for newly installed or rebuilt WSUS servers.

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Timeline

  1. 21.07.2026 12:05 1 articles · 5h ago

    WSUS sync failures and timeouts disrupt Windows Update scans

    Victim Impact Update

    Impacted WSUS servers began showing increased synchronization times and sync operation timeouts that caused Windows Update scans to fail or time out, preventing administrators from deploying the latest Windows updates via WSUS or Configuration Manager.

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  2. 21.07.2026 12:05 1 articles · 5h ago

    Microsoft restores WSUS synchronization for newly installed and rebuilt servers

    Mitigation Patch Update

    Microsoft rolled out a service-side mitigation for newly installed or rebuilt WSUS servers after heightened impact was observed starting July 13, restoring synchronization times and sync operations to normal for those installations.

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  3. 20.07.2026 03:00 2 articles · 1d ago

    Microsoft shares manual fix for WSUS sync delays and timeouts

    Initial Disclosure

    Microsoft provided a manual cleanup process for existing WSUS installations still experiencing sync operation issues and timeouts, instructing administrators to back up SUSDB, run a cleanup query in SQL Management Studio against SUSDB databases including replicas, reset MaxXMLPerRequest, reindex SUSDB, run the WSUS Server Cleanup Wizard, and recycle IISReset or WsusPool to clear cached catalog state.

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