CVE-2025-12907
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected Chrome browsers through insufficient input validation in Devtools. Users who interact with malicious content in Chrome Devtools are affected. The vulnerability requires user action in Devtools to trigger exploitation.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary code execution, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Limited code execution in browser context, potentially stealing session cookies, credentials, or performing actions on behalf of the user.
If Mitigated
No impact if Chrome is updated to patched version or Devtools access is restricted.
🎯 Exploit Status
Requires user action in Devtools, making exploitation less trivial than drive-by attacks. No public exploit details available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 140.0.7339.80 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome settings 2. Click 'About Chrome' 3. Chrome will automatically check for and install update 4. Click 'Relaunch' to restart Chrome with updated version
🔧 Temporary Workarounds
Disable Devtools Access
allPrevent users from accessing Chrome Devtools through enterprise policies
For Windows: Set registry key HKEY_LOCAL_MACHINE\Software\Policies\Google\Chrome\DeveloperToolsDisabled to 1
For macOS/Linux: Configure via Chrome policies JSON file
🧯 If You Can't Patch
- Restrict user access to Chrome Devtools through enterprise policies
- Implement application whitelisting to prevent execution of unauthorized binaries
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in settings > About Chrome. If version is below 140.0.7339.80, system is vulnerable.Check Version:
chrome://version/ or 'google-chrome --version' in terminalVerify Fix Applied:
Confirm Chrome version is 140.0.7339.80 or higher after update and restart.📡 Detection & Monitoring
Log Indicators:
- Unusual Devtools usage patterns
- Multiple failed Devtools access attempts
- Suspicious JavaScript execution in Devtools context
Network Indicators:
- Unusual outbound connections from Chrome process following Devtools interaction
SIEM Query:
process_name="chrome.exe" AND command_line CONTAINS "--remote-debugging-port" AND version < "140.0.7339.80"