CVE-2026-20002
📋 TL;DR
This SQL injection vulnerability in Cisco Secure FMC's web management interface allows authenticated attackers to execute arbitrary SQL commands. Attackers with valid credentials could gain full database access and read files on the underlying OS. Organizations using vulnerable Cisco Secure FMC versions are affected.
💻 Affected Systems
- Cisco Secure Firewall Management Center
⚠️ 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
Full database compromise leading to credential theft, configuration exposure, and potential lateral movement to underlying OS with file read access.
Likely Case
Data exfiltration from the FMC database including device configurations, user credentials, and security policies.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Requires valid user credentials but SQL injection exploitation is straightforward once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.4.1 and later
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-sql-injection-2qH6CcJd
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download and install FMC version 7.4.1 or later from Cisco Software Center. 3. Apply the update through the web interface. 4. Restart the FMC appliance.
🔧 Temporary Workarounds
Restrict Management Access
allLimit access to the FMC web interface to trusted IP addresses only
Configure firewall rules to restrict access to FMC management IP/port
Implement WAF Rules
allDeploy web application firewall with SQL injection detection rules
Configure WAF to block SQL injection patterns targeting FMC endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate FMC from untrusted networks
- Enforce strong authentication policies and monitor for suspicious user activity
🔍 How to Verify
Check if Vulnerable:
Check FMC version via web interface: System > Updates > Version InformationCheck Version:
ssh admin@fmc-ip 'show version' or check web interfaceVerify Fix Applied:
Verify version is 7.4.1 or later in System > Updates > Version Information📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed authentication attempts followed by SQL-like patterns in web logs
- Unexpected file read operations in system logs
Network Indicators:
- Unusual outbound database connections from FMC
- SQL injection patterns in HTTP requests to FMC management interface
SIEM Query:
source="fmc-web-logs" AND (url="*sql*" OR method="POST" AND (body="*SELECT*" OR body="*UNION*" OR body="*INSERT*" OR body="*DELETE*"))