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.

Published: 2022-07-26 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-29958 is rated Moderate Risk (52.3/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.47%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-29958

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.16% 0.47% +0.30%
2 2026-06-06 0.06% 0.16% +0.10%
3 2025-03-17 — 0.06% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-29958

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2022-29958

Affected software / configurations for CVE-2022-29958

Vendor Product Version Raw CPE
jtekt pc10g-cpu_tcc-6353_firmware — cpe:2.3:o:jtekt:pc10g-cpu_tcc-6353_firmware:-:*:*:*:*:*:*:*
jtekt pc10ge_tcc-6464_firmware — cpe:2.3:o:jtekt:pc10ge_tcc-6464_firmware:-:*:*:*:*:*:*:*
jtekt pc10p_tcc-6372_firmware — cpe:2.3:o:jtekt:pc10p_tcc-6372_firmware:-:*:*:*:*:*:*:*
jtekt pc10p-dp_tcc-6726_firmware — cpe:2.3:o:jtekt:pc10p-dp_tcc-6726_firmware:-:*:*:*:*:*:*:*
jtekt pc10p-dp-io_tcc-6752_firmware — cpe:2.3:o:jtekt:pc10p-dp-io_tcc-6752_firmware:-:*:*:*:*:*:*:*
jtekt pc10b-p_tcc-6373_firmware — cpe:2.3:o:jtekt:pc10b-p_tcc-6373_firmware:-:*:*:*:*:*:*:*
jtekt pc10b_tcc-1021_firmware — cpe:2.3:o:jtekt:pc10b_tcc-1021_firmware:-:*:*:*:*:*:*:*
jtekt pc10e_tcc-4737_firmware — cpe:2.3:o:jtekt:pc10e_tcc-4737_firmware:-:*:*:*:*:*:*:*
jtekt pc10el_tcc-4747_firmware — cpe:2.3:o:jtekt:pc10el_tcc-4747_firmware:-:*:*:*:*:*:*:*
jtekt plus_cpu_tcc-6740_firmware — cpe:2.3:o:jtekt:plus_cpu_tcc-6740_firmware:-:*:*:*:*:*:*:*
jtekt pc3jx_tcc-6901_firmware — cpe:2.3:o:jtekt:pc3jx_tcc-6901_firmware:-:*:*:*:*:*:*:*
jtekt pc3jx-d_tcc-6902_firmware — cpe:2.3:o:jtekt:pc3jx-d_tcc-6902_firmware:-:*:*:*:*:*:*:*
jtekt pc10pe_tcc-1101_firmware — cpe:2.3:o:jtekt:pc10pe_tcc-1101_firmware:-:*:*:*:*:*:*:*
jtekt pc10pe-1616p_tcc-1102_firmware — cpe:2.3:o:jtekt:pc10pe-1616p_tcc-1102_firmware:-:*:*:*:*:*:*:*
jtekt pcdl_tkc-6688_firmware — cpe:2.3:o:jtekt:pcdl_tkc-6688_firmware:-:*:*:*:*:*:*:*
jtekt nano_10gx_tuc-1157_firmware — cpe:2.3:o:jtekt:nano_10gx_tuc-1157_firmware:-:*:*:*:*:*:*:*
jtekt nano_cpu_tuc-6941_firmware — cpe:2.3:o:jtekt:nano_cpu_tuc-6941_firmware:-:*:*:*:*:*:*:*

References for CVE-2022-29958

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-22-172-02 Third Party Advisory US Government Resource
https://www.forescout.com/blog/ Third Party Advisory
cvelogic Threat Intelligence