KB5120385: Overview with user sentiment and feedback
Last Updated September 25, 2026
Probability of successful installation and continued operation of the machine
Overview
KB5120385 is an August 2026 Monthly Rollup cumulative security update for Windows Server 2012 R2 Extended Security Updates (ESU). This patch addresses security vulnerabilities and includes quality improvements, with a notable focus on Secure Boot certificate deployment and device targeting enhancements. The update is part of the ongoing ESU program that extends support for Windows Server 2012 R2 through October 13, 2026.
General Purpose
- Secure Boot Certificate Updates: Delivers expanded device targeting data to increase coverage of devices eligible for automatic Secure Boot certificate deployment
- Security Vulnerability Fixes: Addresses multiple security vulnerabilities as documented in the August 2026 Security Updates
- Quality Improvements: Includes cumulative fixes and enhancements building upon previous monthly rollups
- Servicing Stack Requirements: Requires latest Servicing Stack Update (KB5106412) to be installed first for successful deployment
- Extended Support Continuation: Maintains security coverage for Windows Server 2012 R2 during its Extended Security Update period
General Sentiment
The patch addresses critical infrastructure needs for organizations maintaining Windows Server 2012 R2 systems under ESU agreements. While the update is straightforward and follows Microsoft's standard monthly rollup pattern, organizations should be aware of the Secure Boot certificate expiration issue affecting Windows devices globally starting June 2026. The requirement for prerequisite servicing stack installation adds a deployment consideration but is a standard practice. Limited community discussion suggests this is a routine security update with no widespread reported issues.
Known Issues
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 2026-09-25 07:22 PM
