RCE in Gryphonconnect Gryphon Tower
CVE-2021-20139
An unauthenticated command injection vulnerability exists in the parameters of operation 3 in the controller_server service on Gryphon Tower routers. 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 controller_server service on port 9999.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.040 (89.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Gryphonconnect Gryphon_tower
- Gryphonconnect Gryphon_tower_firmware
- N/a Gryphon Tower Router — versions <= 04.0004.12 (Current)
Weakness classification (CWE)
References
- vulnreport@tenable.com (Exploit, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20139?
- CVE-2021-20139 is a high-severity vulnerability in Gryphonconnect Gryphon Tower, classified under OS Command Injection. CVSS score: 8.8/10. Published 2021-12-09.
- How severe is CVE-2021-20139?
- High severity. CVSS v3 base score is 8.8 out of 10.