{"cve":"CVE-2022-31206","nvd":{"published":"2022-07-26T22:15:11.400","modified":"2026-06-17T04:45:07.197","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-347"],"references":["https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02","https://www.forescout.com/blog/","https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02","https://www.forescout.com/blog/"],"products":["omron:nj101-1000_firmware","omron:nj101-1020_firmware","omron:nj101-9000_firmware","omron:nj101-9020_firmware","omron:nj301-1100_firmware","omron:nj301-1200_firmware","omron:nj501-1300_firmware","omron:nj501-1320_firmware","omron:nj501-1340_firmware","omron:nj501-1400_firmware","omron:nj501-1420_firmware","omron:nj501-1500_firmware","omron:nj501-1520_firmware","omron:nj501-4300_firmware","omron:nj501-4320_firmware","omron:nj501-4400_firmware","omron:nj501-4500_firmware","omron:nj501-5300-1_firmware","omron:nj501-5300_firmware","omron:nx701-1600_firmware","omron:nx701-1620_firmware","omron:nx701-1700_firmware","omron:nx701-1720_firmware","omron:nx701-z600_firmware","omron:nx701-z700_firmware"],"source":"nvd","synced_at":"2026-10-19T21:33:44.859608815+00:00"},"epss":{"cve":"CVE-2022-31206","score":0.01118,"percentile":0.66122,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}