Microsoft Edge browser (139.0.3405.86) 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 139.0.3405.86 and earlier
Microsoft Edge (Chromium-based) 139.0.7258.66/67 or earlier
Resolved Vulnerabilities
Memory reuse after freeing in the Cast function in Microsoft Edge (Chromium-based) (CVE-2025-8578)
Memory Reuse After Freeing Vulnerability in the Extensions feature in Microsoft Edge (Chromium-based) (CVE-2025-8576)
Improper Functional Implementation Vulnerability in the Extensions feature in Microsoft Edge (Chromium-based) (CVE-2025-8581)
Improper Functional Implementation Vulnerability in the Filesystems feature in Microsoft Edge (Chromium-based) (CVE-2025-8580)
Inappropriate implementation in Gemini Live in Chrome vulnerability in Microsoft Edge (Chromium-based) (CVE-2025-8579)
Insufficient validation of untrusted input in DOM vulnerability in Microsoft Edge (Chromium-based) (CVE-2025-8582)
Improper Functional Implementation Vulnerability in the Permissions feature in Microsoft Edge (Chromium-based) (CVE-2025-8583)
Improper Functional Implementation Vulnerability in the Picture In Picture feature in Microsoft Edge (Chromium-based) (CVE-2025-8577)
Vulnerability Patches
The following product-specific Vulnerability Patches were made available in the August 08, 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 version 139.0.3405.86
Microsoft Edge (Chromium-based) 139.0.7258.66/67 version