CVE-2022-29951
CWE-306Published: July 26, 2022· Updated: Jun 17, 2026
Official Description
JTEKT TOYOPUC PLCs through 2022-04-29 mishandle authentication. They utilize the CMPLink/TCP protocol (configurable on ports 1024-65534 on either TCP or UDP) for a wide variety of engineering purposes such as starting and stopping the PLC, downloading and uploading projects, and changing configuration settings. This protocol does not have any authentication features, allowing any attacker capable of communicating with the port in question to invoke (a subset of) desired functionality.
Risk Analysis
JTEKT TOYOPUC PLCs use the unauthenticated CMPLink/TCP protocol for critical engineering functions. Attackers can remotely stop the PLC or change configurations, resulting in a 9.1 CVSS score. No public exploits are currently known.
No public exploit is known for this vulnerability, and it is not in CISA KEV. The flaw is remotely exploitable.
Restrict access to the CMPLink/TCP ports to trusted networks only. Consult JTEKT for security hardening documentation.
Technical Analysis
CVE-2022-29951 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-306)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-29951 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts