CVE-2025-20334
📋 TL;DR
A command injection vulnerability in Cisco IOS XE's HTTP API allows authenticated attackers or social engineering victims to execute arbitrary commands with root privileges. This affects Cisco IOS XE Software systems with the HTTP API enabled. Attackers can gain complete control over affected devices.
💻 Affected Systems
- Cisco IOS XE Software
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install persistent backdoors, exfiltrate all data, pivot to other network segments, or render the device inoperable.
Likely Case
Attacker gains root access to the device, enabling configuration changes, credential theft, and network reconnaissance.
If Mitigated
Limited impact if HTTP API is disabled or access is restricted to trusted networks only.
🎯 Exploit Status
Exploitation requires administrative credentials or social engineering of an authenticated administrator. The vulnerability itself is straightforward command injection.
🛠️ 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-ios-xe-cmd-inject-rPJM8BGL
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply the recommended fixed software version. 3. Schedule maintenance window for device restart. 4. Verify patch application post-restart.
🔧 Temporary Workarounds
Disable HTTP API
cisco-iosCompletely disable the vulnerable HTTP API subsystem if not required
no ip http server
no ip http secure-server
Restrict API Access
cisco-iosLimit HTTP API access to trusted management networks only
ip http access-class <ACL-NUMBER>
ip http secure-access-class <ACL-NUMBER>
🧯 If You Can't Patch
- Disable HTTP API entirely if not needed for operations
- Implement strict network segmentation to limit HTTP API access to management networks only
🔍 How to Verify
Check if Vulnerable:
Check if HTTP API is enabled: 'show running-config | include ip http' and verify version against Cisco advisoryCheck Version:
show version | include VersionVerify Fix Applied:
Verify running version matches fixed version: 'show version' and confirm HTTP API configuration if kept enabled📡 Detection & Monitoring
Log Indicators:
- Unusual API calls with command-like parameters
- Multiple failed authentication attempts followed by successful API access
- Configuration changes from unexpected sources
Network Indicators:
- HTTP API requests containing shell metacharacters or command injection patterns
- Unexpected outbound connections from network devices
SIEM Query:
source="ios-xe" AND (http_api_access OR command_execution) AND suspicious_parameters