CVE-2021-20138 — HIGH (8.8)

Q: How severe is CVE-2021-20138?

CVE-2021-20138 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-20138?

Check the references section above for vendor advisories and patch information. Affected products include: Gryphonconnect Gryphon Tower Firmware, Gryphonconnect Gryphon Tower.

Vulnerability 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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Gryphonconnect	Gryphon Tower Firmware	<= 04.0004.12
Gryphonconnect	Gryphon Tower	-

Related Weaknesses (CWE)

CWE-78

References

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

FAQ

What is CVE-2021-20138?

CVE-2021-20138 is a vulnerability with a CVSS score of 8.8 (HIGH). 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...

How severe is CVE-2021-20138?

CVE-2021-20138 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-20138?

Check the references section above for vendor advisories and patch information. Affected products include: Gryphonconnect Gryphon Tower Firmware, Gryphonconnect Gryphon Tower.