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Fencer Vulns
high 7.5

CVE-2022-31205 json

In Omron CS series, CJ series, and CP series PLCs through 2022-05-18, the password for access to the Web UI is stored in memory area D1449.…

published 2022-07-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52789

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

In Omron CS series, CJ series, and CP series PLCs through 2022-05-18, the password for access to the Web UI is stored in memory area D1449...D1452 and can be read out using the Omron FINS protocol without any further authentication.

Patch / fix

  • omron sysmac_cs1_firmware 4.1
  • omron sysmac_cj2m_firmware 2.1
  • omron sysmac_cj2h_firmware 1.5
  • omron sysmac_cp1e_firmware 1.30
  • omron sysmac_cp1h_firmware 1.30
  • omron sysmac_cp1l_firmware 1.10

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-179-02 updated cvss 6.5

Omron SYSMAC CS/CJ/CP Series and NJ/NX Series

  • Omron CP1W-CIF41 Omron SYSMAC CJ2H < 1.5 Omron SYSMAC CJ2M < 2.1 Omron SYSMAC CP1E/CP1H < 1.30 Omron SYSMAC CP1L < 1.10 Omron SYSMAC CS1H/CJ1G < 4.1
    +2 more products
    Omron SYSMAC CX-Programmer < 9.6 Omron SYSMAC NJ/NX Series < 1.49 (1.29 for NX7)
    affected: mitigation “For CVE-2022-31205: Omron recommends using different passwords between the CP1W-CIF41 Ethernet Option Board and CP1 PLC itself. The Web UI password will not grant access to the PLC.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-312 Cleartext Storage of Sensitive Information

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.