CVE-2025-20282
📋 TL;DR
This critical vulnerability in Cisco ISE and ISE-PIC allows unauthenticated remote attackers to upload arbitrary files and execute them as root on the underlying operating system. Attackers can achieve complete system compromise through remote code execution. All organizations running affected versions of these Cisco identity services products are at risk.
💻 Affected Systems
- Cisco Identity Services Engine (ISE)
- Cisco Identity Services Engine - Passive Identity Connector (ISE-PIC)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with root privileges, allowing attackers to steal credentials, pivot to other systems, deploy ransomware, or establish persistent backdoors.
Likely Case
Remote code execution leading to credential theft, lateral movement within the network, and deployment of malware or persistence mechanisms.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to vulnerable systems.
🎯 Exploit Status
The vulnerability requires no authentication and has straightforward exploitation path for attackers with network access to the vulnerable API endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific fixed versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-rce-ZAd2GnJ6
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply the appropriate patch from Cisco. 3. Restart affected ISE/ISE-PIC systems. 4. Verify patch installation and system functionality.
🔧 Temporary Workarounds
Network Access Control
allRestrict network access to Cisco ISE/ISE-PIC management interfaces to trusted IP addresses only
Firewall Rules
allImplement strict firewall rules to block external access to vulnerable API endpoints
🧯 If You Can't Patch
- Immediately isolate affected systems from internet and untrusted networks
- Implement strict network segmentation and monitor for suspicious file upload activities
🔍 How to Verify
Check if Vulnerable:
Check Cisco ISE version against affected versions listed in the Cisco security advisoryCheck Version:
show version (on Cisco ISE CLI)Verify Fix Applied:
Verify installed version matches or exceeds the patched version specified in Cisco advisory📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activities to ISE API endpoints
- Unauthenticated access attempts to internal APIs
- Suspicious process execution as root
Network Indicators:
- Unusual outbound connections from ISE systems
- File upload traffic to ISE management interfaces from untrusted sources
SIEM Query:
source="cisco_ise" AND (event_type="file_upload" OR api_endpoint="*/internal/*") AND user="unauthenticated"