CVE-2026-2630
📋 TL;DR
This CVE describes a command injection vulnerability in Tenable Security Center that allows authenticated remote attackers to execute arbitrary commands on the underlying server. Attackers with valid credentials can exploit this to gain full control of the server hosting the security management platform. Organizations running vulnerable versions of Tenable Security Center are affected.
💻 Affected Systems
- Tenable Security 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
Complete compromise of the Tenable Security Center server, allowing attackers to pivot to other systems, steal sensitive vulnerability data, disable security monitoring, and establish persistent access to the network.
Likely Case
Attackers with stolen or compromised credentials execute commands to install backdoors, exfiltrate vulnerability scan data, or use the server as a foothold for lateral movement.
If Mitigated
With proper network segmentation, strong authentication controls, and monitoring, exploitation would be detected and contained before significant damage occurs.
🎯 Exploit Status
Exploitation requires valid credentials but is technically simple once authenticated. The CWE-78 pattern is well-understood by attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Tenable Security Center 6.0.0
Vendor Advisory: https://www.tenable.com/security/tns-2026-06
Restart Required: Yes
Instructions:
1. Download Tenable Security Center 6.0.0 from the Tenable support portal. 2. Backup your current configuration and database. 3. Run the installer/upgrade package. 4. Restart the Tenable Security Center service. 5. Verify the upgrade completed successfully.
🔧 Temporary Workarounds
Restrict Network Access
allLimit access to Tenable Security Center to only trusted IP addresses and networks using firewall rules.
Enforce Strong Authentication
allRequire multi-factor authentication for all Tenable Security Center accounts and implement account lockout policies.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the Tenable Security Center server from critical systems
- Deploy application-level monitoring and alerting for suspicious command execution patterns
🔍 How to Verify
Check if Vulnerable:
Check the Tenable Security Center version via the web interface (Admin > System Summary) or command line: 'cat /opt/sc/version.txt' on Linux systems.Check Version:
cat /opt/sc/version.txtVerify Fix Applied:
Verify the version shows 6.0.0 or higher and test that command injection attempts are properly sanitized and blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login
- Suspicious processes spawned from the Tenable Security Center service
Network Indicators:
- Unexpected outbound connections from the Tenable Security Center server
- Traffic to known malicious IPs or domains
SIEM Query:
source="tenable_sc.log" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")