KB5070881: Overview with user sentiment and feedback

Overview

This out-of-band (OOB) update for Windows Server 2025 includes quality improvements and security fixes. It is a cumulative update that includes the security fixes and improvements from the October 14, 2025 security update (KB5066835). The update addresses a remote code execution (RCE) vulnerability that was identified in the Windows Server Update Services (WSUS) reporting web services. It also includes a servicing stack update (SSU) that makes quality improvements to the component that installs Windows updates.

General Purpose

The main purpose of this update is to address a critical security vulnerability in the WSUS reporting web services that could allow remote code execution. This update is cumulative, so it includes all previous security and quality fixes in addition to the RCE vulnerability patch. The SSU component update ensures a robust and reliable servicing stack for installing future Microsoft updates on Windows Server 2025 systems.

General Sentiment

This out-of-band update is an important one for Windows Server 2025 administrators to apply, as the RCE vulnerability in WSUS could allow attackers to remotely execute malicious code on affected systems. The inclusion of the servicing stack update is also positive, as it helps ensure a stable and reliable update process going forward. However, there are some known issues with this update, including problems with Active Directory replication and directory synchronization, as well as temporary issues for some machines enrolled in the Hotpatch program. Administrators should carefully review the known issues and apply any additional workarounds before installing this update.

Known Issues

• Active Directory replication failures due to schema mismatch issues on domain controllers running Windows Server 2025 with the schema master role- Incomplete synchronization of large AD security groups (over 10,000 members) for applications using the Active Directory directory synchronization (DirSync) control- Temporary loss of Hotpatch status for some Windows Server 2025 machines that installed this update- Removal of WSUS synchronization error details to address the RCE vulnerability

Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2025-11-30 01:22 AM

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