CVE-2025-20275
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary code on Cisco Unified CCX Editor systems by exploiting insecure Java deserialization. Attackers can achieve this by tricking authenticated local users into opening malicious .aef files. The vulnerability affects Cisco Unified Contact Center Express Editor users.
💻 Affected Systems
- Cisco Unified Contact Center Express (Unified CCX) Editor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the user who launched the editor, potentially leading to lateral movement, data theft, or ransomware deployment.
Likely Case
Local privilege escalation or malware execution on individual workstations running the vulnerable editor, potentially compromising sensitive contact center data.
If Mitigated
Limited impact with proper user training and file restrictions preventing malicious .aef files from being opened.
🎯 Exploit Status
Requires social engineering to persuade authenticated users to open malicious .aef files. Exploit leverages insecure Java deserialization (CWE-502).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific patched versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-editor-rce-ezyYZte8
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply the appropriate patch from Cisco. 3. Restart affected systems. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict .aef file handling
windowsBlock or restrict opening of .aef files from untrusted sources
Use Group Policy or endpoint protection to restrict .aef file execution
User awareness training
allTrain users not to open .aef files from unknown or untrusted sources
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized .aef file execution
- Use endpoint detection and response (EDR) solutions to monitor for suspicious .aef file activity
🔍 How to Verify
Check if Vulnerable:
Check Cisco Unified CCX Editor version against affected versions listed in Cisco advisoryCheck Version:
Check within Cisco Unified CCX Editor application or system documentationVerify Fix Applied:
Verify installed version matches or exceeds patched version from Cisco advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected .aef file openings
- Java deserialization errors
- Unusual process execution from editor
Network Indicators:
- Outbound connections from editor process to unexpected destinations
SIEM Query:
Process creation events where parent process is Cisco CCX Editor and child process is unusual or unexpected