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描述

Remediation of Microsoft Edge (Chromium) Remote Code Execution vulnerability (CVE-2025-9478, Plugin ID: 258091). Documentation includes before/after evidence, remediation steps, and Tenable validation.

介绍

# STIG – Microsoft Edge (Chromium) < 139.0.3405.125 Remote Code Execution (CVE-2025-9478, Plugin ID: 258091)

## Before
- **Finding:** Microsoft Edge (version 139.0.3405.86) was outdated and vulnerable to a critical Remote Code Execution (RCE) flaw (CVE-2025-9478).  
- **Risk:** Attackers could exploit a use-after-free in ANGLE to execute arbitrary code through crafted HTML pages.  
- **Evidence:**  
  ![Before – Tenable Finding](Edge-Before-Finding.png)  
  ![Before – Version Details](Edge-Before-Details.png)  

---

## Remediation
1. Updated Microsoft Edge to version `139.0.3405.125` (patched).  
2. Verified the version update (`edge://settings/help`).  
3. Restarted Edge to finalize the patch.  
4. Performed a Tenable rescan to confirm the vulnerability was resolved.  

---

## After
Microsoft Edge successfully updated to version `139.0.3405.125`, mitigating CVE-2025-9478 and preventing potential remote code execution.  

**Evidence:**  
Edge-After-Details.png  
Edge-After-Tenable-Rescan.png

文件快照

 [4.0K]  /data/pocs/5543214bd71ffefbbd04917dbdf5e85058bc1ff4
├── [159K]  Edge-Before-Details.png
├── [108K]  Edge-Before-Finding.png
└── [1017]  README.md

0 directories, 3 files

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