CVE-2022-31206
criticalpriority · track · 39OT risk · elevatedEPSS 0.011 · 66 %ileEURUUSEPSS · scored 2026-10-27
The Omron SYSMAC Nx product family PLCs (NJ series, NY series, NX series, and PMAC series) through 2022-005-18 lack cryptographic authentication. These PLCs are programmed using the SYMAC Studio engineering software (which compiles IEC 61131-3 conformant POU code to native machine code for execution by the PLC's runtime). The resulting machine code is executed by a runtime, typically controlled by a real-time operating system. The logic that is downloaded to the PLC does not seem to be cryptographically authenticated, allowing an attacker to manipulate transmitted object code to the PLC and execute arbitrary machine code on the processor of the PLC's CPU module in the context of the runtime. In the case of at least the NJ series, an RTOS and hardware combination is used that would potentially allow for memory protection and privilege separation and thus limit the impact of code execution. However, it was not confirmed whether these sufficiently segment the runtime from the rest of the RTOS.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationCP1W-CIF41cisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CJ2Hcisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CJ2Mcisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CP1E/CP1Hcisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CP1Lcisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CS1H/CJ1Gcisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC CX-Programmercisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
- MitigationSYSMAC NJ/NX Seriescisa_csaf_ot
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 4.4–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (43)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-22-179-02Omron SYSMAC CS/CJ/CP Series and NJ/NX Series2022-06-28icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could cause a denial-of-service condition and allow remote code execution.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2022-31206/cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-22-179-02cnnvd
- https://www.auscert.org.au/bulletins/ESB-2022.3140cnnvd
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2022062924cnnvd
- https://www.forescout.com/blog/cnnvd
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02enisa_euvd
- https://www.forescout.com/blog/enisa_euvd
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