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Fencer Vulns
critical 9.1

CVE-2022-29951 json

JTEKT TOYOPUC PLCs through 2022-04-29 mishandle authentication.

published 2022-07-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-34258

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-172-02 updated cvss 7.7

JTEKT TOYOPUC

  • JTEKT Corporation Nano 10GX Type=TUC-1157 JTEKT Corporation Nano CPU Type=TUC-6941 JTEKT Corporation PC3JX Type=TCC-6901 JTEKT Corporation PC3JX-D Type=TCC-6902 JTEKT Corporation PC10B Type=TCC-1021 JTEKT Corporation PC10B-P Type=TCC-6373
    +11 more products
    JTEKT Corporation PC10E Type=TCC-4737 JTEKT Corporation PC10EL Type=TCC-4747 JTEKT Corporation PC10G-CPU Type=TCC-6353 JTEKT Corporation PC10GE Type=TCC-6464 JTEKT Corporation PC10P Type=TCC-6372 JTEKT Corporation PC10P-DP Type=TCC-6726 JTEKT Corporation PC10P-DP-IO Type=TCC-6752 JTEKT Corporation PC10PE Type=TCC-1101 JTEKT Corporation PC10PE-1616P Type=TCC-1102 JTEKT Corporation PCDL Type=TKC-6688 JTEKT Corporation Plus CPU Type=TCC-6740
    affected: mitigation “Locate control system networks and remote devices behind firewalls and isolate them from the business network.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

  • jtekt pc10g-cpu_tcc-6353_firmware

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.