UPDATE 14 September 2026 (BleepingComputer): Microsoft released emergency out-of-band updates that fix Remote Desktop Services failures introduced by the September 2026 security cumulatives, plus related Hyper-V Host Compute Service issues on some Windows 11 builds. OOB packages cited: Windows Server 2025 KB5129235, Server 2022 KB5129237, Server 2019 KB5129238; Windows 11 24H2/25H2 KB5129195, Windows 11 26H1 KB5129194; Windows 10 21H2/22H2 KB5129236.

Server OOBs via Microsoft Update Catalog; the Windows 11 26H1 OOB also via Windows Update, Windows Update for Business and WSUS. USB audio regressions from September updates are not fully resolved by these OOBs.

Earlier state: Microsoft confirmed RDS instability on release health and published Known Issue Rollback Group Policy packages (e.g. Server 2025 KB5122871, Server 2022 KB5122882, Server 2019 KB5122876) while developing the permanent fix. Prefer the matching OOB over long-lived KIR or cumulative rollback.

Operational advisory for AU Windows estates — distinct from Patch Tuesday CVE cards. (sources: Microsoft Support KB5129195; BleepingComputer)

Correction (31 Oct 2026): the card is now dated 14 September 2026, the date of Microsoft's out-of-band update notice and BleepingComputer's reports, instead of 10 September; replaced the link to Microsoft's Windows release health page, which no longer shows this issue, with Microsoft's KB5129195 notice, and removed a reference to other Windows 10 packages that no linked source gives. (sources: Microsoft Support; BleepingComputer)