Microsoft Releases September Patch Tuesday Updates for Windows Security

On September 9, 2024, Microsoft rolled out its Patch Tuesday updates, encompassing a series of enhancements and fixes designed to bolster security across its operating systems. The updates, cataloged under KB5043064, KB5043050, KB5043051, and KB5043083, target Windows 10, while Windows 11 users receive KB5043076 and KB5043067 for versions 22H2 and 21H2, along with KB5043080 for version 24H2. These updates primarily focus on addressing security vulnerabilities, but they also introduce new features and rectify existing bugs.

Additional Updates and Enhancements

In addition to the Patch Tuesday updates, Microsoft has introduced an Out-of-Box Experience (OOBE) update, designated as KB5043939, specifically for Windows 11 version 24H2. The company has also made available a Setup update (KB5043353) and a Windows Recovery Environment (WinRE) update (KB5043355), further enhancing the user experience for this latest version.

Moreover, a significant update to Microsoft Defender was also released. This update is crucial, as it ensures that Windows installation images do not fall prey to outdated anti-malware definitions and software binaries. By implementing these updates, users can expect not only heightened security but also potential performance improvements.

Microsoft is delivering the latest security definitions for Windows images through the security intelligence update version 1.417.472.0. The accompanying Defender package version stands at 1.413.494.0. According to Microsoft’s support documentation, the initial hours following a new Windows deployment can expose systems to vulnerabilities due to a gap in Microsoft Defender protection. This vulnerability arises because OS installation images may include outdated anti-malware software binaries.

Devices utilizing either the built-in Windows antivirus or alternative security solutions can reap the benefits of these updates. The Defender updates also encompass critical performance fixes aimed at enhancing the overall user experience.

This article outlines the antimalware update package for Microsoft Defender within OS installation images (WIM and VHD files), supporting the following operating systems:

Windows 11
Windows 10 (Enterprise, Pro, and Home editions)
Windows Server 2022
Windows Server 2019
Windows Server 2016

Version Information

Defender package version: 1.417.472.0

This package updates the anti-malware client, anti-malware engine, and signature versions in the OS installation images to the following:

Platform version: 4.18.24080.9
Engine version: 1.1.24080.9
Security intelligence version: 1.417.472.0

According to Microsoft’s security bulletin, the security intelligence update version 1.417.472.0, released last month, enhances threat detection capabilities against various types of malware, including trojans, ransomware, adware, and backdoor exploits. As of the current writing, the latest intelligence update has reached version 1.419.109.0, promising users an even more robust defense against emerging threats.

Does Microsoft Defender work on Mac?

Yes, Microsoft Defender works on Mac. Microsoft Defender for Endpoint is available for macOS and provides antivirus, endpoint detection and response (EDR), and vulnerability management capabilities. It helps to protect Macs from various security threats including viruses, malware, and other cyber-attacks.

What are the two versions of Microsoft Defender for Office 365?

The two versions of Microsoft Defender for Office 365 are Plan 1 and Plan 2. Plan 1 includes features like safe attachments, safe links, anti-phishing, and real-time detections. Plan 2 includes all Plan 1 features plus advanced threat protection services like automated investigation and response, threat tracking, and attack simulation training.

Update: 21 Sep 2024