MS Family September 2025 Security Update Advisory

Overview

 

Microsoft(https://www.microsoft.com) has released a security update that fixes vulnerabilities in products it has supplied. Users of affected products are advised to update to the latest version.

 

Affected Products

 

Browser Family

Microsoft Edge (Chromium-based)

 

Open Source Software Suite

Azl3 glib 2.78.6-3 on Azure Linux 3.0

Cbl2 glib 2.71.0-5 on CBL Mariner 2.0

 

 

Resolved Vulnerabilities

 

Browser Family

Improper Functional Implementation Vulnerability in the Downloads feature in Microsoft Edge (Chromium-based) (CVE-2025-9867)

Improper Functional Implementation Vulnerability in the Extensions feature in Microsoft Edge (Chromium-based) (CVE-2025-9866)

Improper Functional Implementation Vulnerability in the Toolbar feature in Microsoft Edge (Chromium-based) (CVE-2025-9865)

Memory Reuse After Freeing in V8 Functionality in Microsoft Edge (Chromium-based) (CVE-2025-9864)

Moderate Security Feature Bypass Vulnerability in Microsoft Edge (Chromium-based) (CVE-2025-53791)

 

Open Source Software Suites

 

Vulnerability Patches

 

The following product-specific Vulnerability Patches were made available in the September 5, 2025 Update. Please use the Windows Update feature for automatic installation or refer to the URLs in the product information below to download and install.

Microsoft Edge (Chromium-based) version

https://msrc.microsoft.com/update-guide/

Azl3 glib 2.78.6-3 on Azure Linux 3.0 version

Cbl2 glib 2.71.0-5 on CBL Mariner 2.0 version

https://www.catalog.update.microsoft.com/Search.aspx?q=KBCBL-Mariner Releases