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Microsoft releases emergency Windows updates to fix RDS failures

September 14, 2026 · BleepingComputer · Severity: MEDIUM

Microsoft released emergency out-of-band Windows updates to fix Remote Desktop Services failures introduced by September's Patch Tuesday, restoring RDP connectivity for affected Windows Server systems.

Key Takeaways

  • Microsoft released emergency out-of-band Windows updates to fix Remote Desktop Services authentication failures from September's Patch Tuesday.
  • The emergency updates address a broken authentication stack in the RDP subsystem caused by KB5041893 on multiple Windows Server versions.
  • Administrators experiencing RDS failures after September updates should apply the emergency fixes to restore remote administration capabilities.
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