CVE-2025-54257
📋 TL;DR
A use-after-free vulnerability in Adobe Acrobat Reader allows arbitrary code execution when a user opens a malicious PDF file. This affects users running vulnerable versions of Acrobat Reader on any operating system. The attacker gains the same privileges as the current user.
💻 Affected Systems
- Adobe Acrobat Reader DC
- Adobe Acrobat Reader
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining user-level privileges, enabling data theft, ransomware deployment, or lateral movement.
Likely Case
Malware installation, credential theft, or data exfiltration through crafted PDF documents.
If Mitigated
Limited impact if sandboxing or application control prevents execution, but user data remains at risk.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code identified yet.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to versions after 24.001.30254, 20.005.30774, or 25.001.20672 as applicable
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb25-85.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Reader. 2. Go to Help > Check for Updates. 3. Follow prompts to install latest version. 4. Restart computer after installation.
🔧 Temporary Workarounds
Disable JavaScript in Acrobat Reader
allPrevents JavaScript-based exploitation vectors
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpens untrusted files in sandboxed mode
File > Preferences > Security (Enhanced) > Enable Protected View for all files
🧯 If You Can't Patch
- Block PDF files from untrusted sources at email/web gateways
- Implement application control to restrict Acrobat Reader execution
🔍 How to Verify
Check if Vulnerable:
Check Help > About Adobe Acrobat Reader version against affected versionsCheck Version:
On Windows: wmic product where name="Adobe Acrobat Reader" get versionVerify Fix Applied:
Verify version is higher than affected versions and check for successful update installation📡 Detection & Monitoring
Log Indicators:
- Acrobat crash logs with memory access violations
- Unexpected child processes spawned from Acrobat
Network Indicators:
- Outbound connections from Acrobat to unknown IPs
- DNS requests for suspicious domains after PDF opening
SIEM Query:
process_name:"AcroRd32.exe" AND (event_id:1000 OR parent_process_name:"AcroRd32.exe")