CVE-2022-45794 — An attacker with network access to the affected PLC (CJ-series and CS-series PLC

An attacker with network access to the affected PLC (CJ-series and CS-series PLCs, all versions) may use a network protocol to read and write files on the PLC internal memory and memory card.

01What is this vulnerability?

An attacker with network access to the affected PLC (CJ-series and CS-series PLCs, all versions) may use a network protocol to read and write files on the PLC internal memory and memory card.

02Affected products

Vendor	Product	Versions
Omron	CJ	series and CS-series CPU modules — 0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-01-10T22:56:58.836Z
• Last modified: 2025-05-22T15:46:32.685Z

09References

• www.fa.omron.co.jp — https://www.fa.omron.co.jp/product/security/assets/pdf/en/OMSR-2023-002_en.pdf
• www.dragos.com — https://www.dragos.com/advisory/omron-plc-and-engineering-software-network-and-f…