Microsoft Edge browser (139.0.3405.125) version 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
Microsoft Edge (Chromium-based) 139.0.7258.154/.155 and earlier
Microsoft Edge 139.0.3405.125 and earlier
Resolved Vulnerabilities
Memory reuse after freeing in the ANGLE function in Microsoft Edge (Chromium-based) (CVE-2025-9478)
Vulnerability Patches
The following product-specific Vulnerability Patches were made available in the August 29, 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) 139.0.7258.154/.155 version
Microsoft Edge 139.0.3405.125 version