CVE-2021-20138
8.8 · HIGHOverview
CVE-2021-20138 is a high-severity vulnerability affecting gryphonconnect gryphon_tower_firmware. It was published on December 9, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
An unauthenticated command injection vulnerability exists in multiple parameters in the Gryphon Tower router’s web interface at /cgi-bin/luci/rc. An unauthenticated remote attacker on the same network can execute commands as root on the device by sending a specially crafted malicious packet to the web interface.
Remediation
Check the references section for vendor advisories and patches from gryphonconnect. Update gryphon_tower_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| gryphonconnect | gryphon_tower_firmware | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-20138?
CVE-2021-20138 is a high-severity vulnerability affecting gryphonconnect gryphon_tower_firmware. It was published on December 9, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-20138?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20138?
Check the references section for vendor advisories and patches from gryphonconnect. Update gryphon_tower_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20138?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20138 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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