Vulnerability · Published Dec 9, 2021 · Assigned by tenable

CVE-2021-20139

High 8.8

In plain English

A high-severity security flaw in Gryphon Tower router. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.0% (higher than 91% of all known vulnerabilities).

Severity (CVSS NVD)8.8High

Exploit odds (30 days)4.0%top 9.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	Gryphon Tower router	<= 04.0004.12 (Current)

References

https://www.tenable.com/security/research/tra-2021-51 x_refsource_MISC