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Fencer Vulns
critical 9.8

CVE-2019-18259 json

In Omron PLC CJ series, all versions and Omron PLC CS series, all versions, an attacker could spoof arbitrary messages or execute commands.

published 2019-12-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8056

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

In Omron PLC CJ series, all versions and Omron PLC CS series, all versions, an attacker could spoof arbitrary messages or execute commands.

Vendor advisories

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

cisa ICSA-19-346-02 updated cvss 5.6

Omron PLC CJ and CS Series

  • Omron PLC CJ series Omron PLC CS series Omron PLC NX1P2 series
    affected: mitigation “Filter FINS port: Protect access to Omron's PLC with a firewall and blocking unnecessary remote access to FINS port (default: 9600).” gcc01.safelinks.protection.outlook.com

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

2.11% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Omron PLC CJ and CS Series

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing

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.