OS command injection in Gryphon Tower router
Priority MEDIUM 44CWE-78Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
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.
Why it matters now
EPSS 0.03702 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Gryphon Tower router | <= 04.0004.12 (Current) | — | No fix listed | CNA |
- Gryphon Tower router Vendor— Affected <= 04.0004.12 (Current) Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:gryphonconnect:gryphon_tower_firmware:*:*:*:*:*:*:*:* | up to 04.0004.12 | Vulnerable | Gryphonconnect |
| cpe:2.3:h:gryphonconnect:gryphon_tower:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Gryphonconnect |
- cpe:2.3:o:gryphonconnect:gryphon_tower_firmware:*:*:*:*:*:*:*:* Versions up to 04.0004.12 Vulnerable ·Gryphonconnect
- cpe:2.3:h:gryphonconnect:gryphon_tower:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Gryphonconnect
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20138
- 2026-10-03 Alias added: GHSA-82fw-x9gr-vc6q
References
More Gryphonconnect Gryphon Tower Firmware vulnerabilities
- TI-2021-03446 Insufficiently protected credentials in Gryphon Tower router CVSS 3.1CRITICAL 9.8
- TI-2021-03440 OS command injection in Gryphon Tower router CVSS 3.1HIGH 8.8
- TI-2021-03439 OS command injection in Gryphon Tower router CVSS 3.1HIGH 8.8
- TI-2021-03444 OS command injection in Gryphon Tower router CVSS 3.1HIGH 8.8
- TI-2021-03443 OS command injection in Gryphon Tower router CVSS 3.1HIGH 8.8
- TI-2021-03442 OS command injection in Gryphon Tower router CVSS 3.1HIGH 8.8
Sources
- CVE-2021-20138 · CVE Program
- CVE-2021-20138 · NVD
- FIRST EPSS
- GHSA-82fw-x9gr-vc6q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences