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CVE-2021-20144

HIGH
8.8
CVSS Score
Published: December 9, 2021 at 03:19 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
3 products affected across 2 vendorsGryphon Tower FirmwareGryphon TowerGryphon Tower

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Severity
HIGH8.8
Exploit prediction
EPSS 4%

Description

An unauthenticated command injection vulnerability exists in the parameters of operation 49 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Gryphon Tower Firmware· Gryphonconnect
95%
v ≤ 04.0004.12
gryphonconnect-gryphon-tower (same device)
Gryphon Tower· Tenable
60%
v ≤ 4.0004.12
Gryphon Tower· Gryphonconnectdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCExploitVendor Advisory
Source: [email protected]
https://www.tenable.com/security/research/tra-2021-51

CVSS

8.8HIGH[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78

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