KB5062570: Overview with user sentiment and feedback

Overview

KB5062570 is a security update released on July 8, 2025, for Windows Server, version 23H2, bringing the OS Build to 25398.1732. This update incorporates improvements previously included in updates KB5060118 (released June 10, 2025) and KB5063774 (released July 1, 2025).The update addresses several key areas including DNS Server functionality, language and character support for Chinese characters, performance improvements related to unused language packs, and security enhancements. Notably, it upgrades the curl tool in Windows to version 8.13.0 to protect against potential security risks and implements security hardening changes to the Microsoft RPC Netlogon protocol.Microsoft has also included an important notice about Secure Boot certificates used by most Windows devices that are set to expire starting in June 2026, which might affect the ability of certain personal and business devices to boot securely if not updated in time. Microsoft recommends reviewing guidance and taking action to update certificates in advance to avoid disruption.

General Purpose

The primary purpose of KB5062570 is to enhance security and fix several functional issues in Windows Server, version 23H2. It addresses a DNS Server issue where full zone transfers could not be completed when Extension Mechanisms for DNS was enabled. The update also resolves compliance issues with GB18030 for certain Chinese characters that weren't displaying correctly or weren't accepted when using extended Unicode, implementing a modern ICU-based solution that properly supports GB18030-2022 requirements.Performance improvements are included to address an issue that prevented the complete removal of unused language packs and Feature on Demand packages, which previously led to unnecessary storage use and longer Windows Update installation times. On the security front, the update upgrades the curl tool to version 8.13.0 to protect against potential security risks, including unauthorized access to data or service disruptions. Additionally, it implements security hardening changes to the Microsoft RPC Netlogon protocol by tightening access checks for remote procedure call requests, which means Active Directory domain controllers will no longer allow anonymous clients to invoke certain RPC requests through the Netlogon RPC server.

General Sentiment

The general sentiment toward KB5062570 appears to be positive, as it addresses specific functional issues and enhances security without introducing any known issues. Microsoft explicitly states they are "not currently aware of any issues with this update," which suggests a stable release.However, IT administrators should note that the security hardening changes to the Microsoft RPC Netlogon protocol might affect certain file and print service software, particularly Samba. Organizations using Samba should refer to the Samba release notes for compatibility information. This potential impact on third-party software is something administrators should consider before deployment.The update also includes an important notice about Secure Boot certificates expiring in June 2026, which isn't directly related to this patch but serves as a forward-looking warning for administrators to plan certificate updates well in advance to avoid future boot issues. While this isn't a criticism of the current update, it does highlight the ongoing maintenance requirements for Windows Server environments.

Known Issues

Microsoft has explicitly stated they are not currently aware of any issues with this update.

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 2025-07-15 01:24 PM

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