CVE-2025-43577
📋 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. Successful exploitation gives attackers 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
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malware installation or data exfiltration from the compromised user's system, often as part of targeted attacks or phishing campaigns.
If Mitigated
Limited impact with proper application sandboxing, least privilege principles, and security controls preventing successful exploitation.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to versions after those listed in affected versions
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb25-57.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 if required.
🔧 Temporary Workarounds
Disable JavaScript in PDFs
allPrevents JavaScript execution in PDF files which may be used in exploitation chains
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen untrusted PDFs in Protected View mode to limit potential damage
File > Open > Select 'Protected View' option when opening files
🧯 If You Can't Patch
- Restrict PDF file opening to trusted sources only
- Implement application whitelisting to block unauthorized executables
🔍 How to Verify
Check if Vulnerable:
Check Help > About Adobe Acrobat Reader DC for version number and compare with affected versionsCheck Version:
On Windows: wmic product where name='Adobe Acrobat Reader DC' get versionVerify Fix Applied:
Verify version is newer than affected versions listed in advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected Acrobat Reader crashes
- Suspicious child processes spawned from Acrobat Reader
Network Indicators:
- Outbound connections from Acrobat Reader to unknown IPs
- DNS requests for suspicious domains after PDF opening
SIEM Query:
process_name='AcroRd32.exe' AND (event_id=1000 OR parent_process contains suspicious)