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No exploitation reported

CVE-2022-29958

No exploitation reported by the sources we read.

  • Published2022-07-26
  • WeaknessCWE-345

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.

Timeline

dates in UTC
  1. 2022-07-2622:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-29958?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-29958?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Jtekt nano 10gx tuc-1157 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Jtekt nano cpu tuc-6941 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Jtekt pc10b tcc-1021 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

14 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-22-172-02 CISA17 known affected

    JTEKT TOYOPUC

    Nano 10GX Type=TUC-1157: All versions · Nano CPU Type=TUC-6941: All versions · PC10B Type=TCC-1021: All versions · +14 more

Full record on NVD

Fix

  1. Mitigation from the vendor CISA ICSA-22-172-02 · 17 productsWhen remote access is required, use secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.
  2. Mitigation from the vendor CISA ICSA-22-172-02 · 17 productsLocate control system networks and remote devices behind firewalls and isolate them from the business network.
  3. Mitigation from the vendor CISA ICSA-22-172-02 · 17 productsMinimize network exposure for all control system devices and/or systems, use IP filter functions to allow only specific personal computer/device to connect, and ensure they are not accessible from the Internet.
  4. Mitigation from the vendor CISA ICSA-22-172-02 · 17 productsTo prevent unauthorized devices from being connected to the free ports of the HUB, use a LAN port lock to close the free ports.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDweakness (CWE)CWE-345read 2026-10-23
  • FIRST EPSSEPSS score0.6 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-07-26
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2022-29958?

JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.

Is CVE-2022-29958 actively exploited?

Active exploitation of CVE-2022-29958 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-29958?

CVE-2022-29958 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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