CVE-2025-54255
📋 TL;DR
This CVE describes a violation of secure design principles in Adobe Acrobat Reader that allows security feature bypass impacting integrity. Attackers can exploit this without authentication or user interaction. All users running affected versions of Acrobat Reader are vulnerable.
💻 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
Attackers could bypass security controls to modify or tamper with PDF documents, potentially leading to document integrity compromise or enabling other attack vectors.
Likely Case
Limited integrity bypass allowing attackers to circumvent certain security features in PDF processing, though full impact depends on specific implementation details.
If Mitigated
With proper patching, the vulnerability is eliminated; with workarounds, risk is significantly reduced but not completely removed.
🎯 Exploit Status
No public exploit available. Attack complexity is medium due to secure design principle violation requiring specific conditions. CVSS 4.0 indicates moderate impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to versions after those listed in affected versions
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb25-85.html
Restart Required: No
Instructions:
1. Open Adobe Acrobat Reader. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Alternatively, download latest version from Adobe website.
🔧 Temporary Workarounds
Disable JavaScript in Acrobat Reader
allDisabling JavaScript reduces attack surface and may mitigate some exploitation vectors
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allEnable Protected View for files from potentially untrusted sources
Edit > Preferences > Security (Enhanced) > Enable Protected View at startup
🧯 If You Can't Patch
- Restrict PDF file sources to trusted locations only
- Implement application whitelisting to prevent unauthorized Acrobat Reader execution
🔍 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
- Security feature violation logs in application logs
Network Indicators:
- Unusual PDF downloads from untrusted sources
- Network traffic to known malicious domains after PDF opening
SIEM Query:
source="*acrobat*" AND (event_type="crash" OR event_type="security_violation")