Microsoft Security Response Center

**Why is this Chrome CVE included in the Security Update Guide?** The vulnerability assigned to this CVE is in Chromium Open Source Software (OSS) which is consumed by Microsoft Edge (Chromium-based). It is being documented in the Security Update Guide to announce that the latest version of Microsoft Edge (Chromium-based) is no longer vulnerable. **How can I see the version of the browser?** 1. In your Microsoft Edge browser, click on the 3 dots (...) on the very right-hand side of the window 2. Click on **Help and Feedback** 3. Click on **About Microsoft Edge**

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?** This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency. Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

**Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?** This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency. Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Storage allows an unauthorized attacker to execute code over a network.

Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.

**What is the version information for this release?** Microsoft Edge Version Date Released Based on Chromium Version 139.0.3405.102 8/15/2025 139.0.7258.127/.128

**What is the version information for this release?** Microsoft Edge Version Date Released Based on Chromium Version 139.0.3405.102 8/15/2025 139.0.7258.127/.128

**What is the version information for this release?** Microsoft Edge Version Date Released Based on Chromium Version 139.0.3405.102 8/15/2025 139.0.7258.127/.128

**What is the version information for this release?** Microsoft Edge Version Date Released Based on Chromium Version 139.0.3405.102 8/15/2025 139.0.7258.127/.128