Vulnerabilities · 4h ago
Microsoft pushed emergency out-of-band Windows updates after this month’s security patches broke Remote Desktop Services and introduced regressions in Hyper-V and USB audio on some Windows versions.
The problem is not exploitation but the update itself: the security patch set changed behavior enough to interrupt remote sessions, virtualization, and audio-dependent systems. In plain terms, a patch meant to reduce risk instead created service outages for machines that rely on those components.
For Windows estates that depend on RDS or Hyper-V, the lesson is that update acceptance is now a service-availability decision as much as a security one. What remains exposed after the fix is the operational cost of configuration-specific regressions whenever a patch lands in a live environment.
2 sources covering this story
Microsoft Releases Emergency Patch to Fix RDS Vulnerability
Microsoft has been forced to issue an out-of-band fix for several issues stemming from this month’s Patch Tuesday
Microsoft releases emergency Windows updates to fix RDS failures
Microsoft has released emergency out-of-band Windows updates to fix Remote Desktop Services failures caused by this month's security updates, along with Hyper-V and USB audio problems on some Windows versions.
Part of the PlainSec briefing for 2026-09-15