KB5123038: Overview with user sentiment and feedback

Overview

KB5123038 is a cumulative security update for Internet Explorer 11 released on September 8, 2026. It applies to Windows Server 2012 and Windows Server 2012 R2 under Extended Security Updates (ESU). The update resolves vulnerabilities in Internet Explorer and is part of the September 2026 Monthly Rollup cycle. Note that Internet Explorer has reached end of support; Microsoft recommends upgrading to Microsoft Edge.

General Purpose

• Resolves security vulnerabilities in Internet Explorer 11
• Applies to legacy Windows Server 2012/2012 R2 systems with active ESU subscriptions
• Included in the September 2026 Monthly Rollup; installing either update provides the same improvements
• Not applicable if Monthly Rollup from September 2026 or later is already installed
• Available via Update Catalog, Windows Update for Business, and WSUS

General Sentiment

This is a routine security maintenance update for legacy systems. No community discussion or reported issues are evident. The patch addresses Internet Explorer vulnerabilities for organizations still running Windows Server 2012/R2 under ESU, though Microsoft actively encourages migration to newer platforms and Microsoft Edge.

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 2026-10-12 07:19 AM

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