CVE-2023-27396

criticalpriority · track · 39OT risk · elevatedEPSS 0.014 · 72 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.37% (72nd) EPSS

CVSS 9.8 · critical

Is it mine?

279 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

FINS (Factory Interface Network Service) is a message communication protocol, which is designed to be used in closed FA (Factory Automation) networks, and is used in FA networks composed of OMRON products. Multiple OMRON products that implement FINS protocol contain following security issues -- (1)Plaintext communication, and (2)No authentication required. When FINS messages are intercepted, the contents may be retrieved. When arbitrary FINS messages are injected, any commands may be executed on, or the system information may be retrieved from, the affected device. Affected products and versions are as follows: SYSMAC CS-series CPU Units, all versions, SYSMAC CJ-series CPU Units, all versions, SYSMAC CP-series CPU Units, all versions, SYSMAC NJ-series CPU Units, all versions, SYSMAC NX1P-series CPU Units, all versions, SYSMAC NX102-series CPU Units, all versions, and SYSMAC NX7 Database Connection CPU Units (Ver.1.16 or later)

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306US

affected products (279)

Products and version ranges known to be affected.

OMRON Corporation Multiple OMRON products which implement FINS protocol≤ SYSMAC CS-series CPU Units all versions, SYSMAC CJ-series CPU Units all versions, SYSMAC CP-series CPU Units all versions, SYSMAC NJ-series CPU Units all versions, SYSMAC NX1P-series CPU Units all versions, SYSMAC NX102-series CPU Units all versions, and SYSMAC NX7 Database Connection CPU Units Ver.1.16 or laterenisa_euvdEU
Omron Electronics LLC SYSMAC CJall versionsfstec_bduRU
Omron Electronics LLC SYSMAC CPall versionsfstec_bduRU
Omron Electronics LLC SYSMAC CSall versionsfstec_bduRU
Omron Electronics LLC SYSMAC NJall versionsfstec_bduRU
Omron Electronics LLC SYSMAC NX102all versionsfstec_bduRU
Omron Electronics LLC SYSMAC NX1Pall versionsfstec_bduRU
Omron Electronics LLC SYSMAC NX7all versionsfstec_bduRU
omron cj2h-cpu64 firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu64_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu64-eip firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu64-eip_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu65 firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu65_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu65-eip firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu65-eip_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu66 firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu66_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu66-eip firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu66-eip_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu67 firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu67_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu67-eip firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu67-eip_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu68 firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu68_firmware:*:*:*:*:*:*:*:*
omron cj2h-cpu68-eip firmwareall versionsnvdUScpe:2.3:o:omron:cj2h-cpu68-eip_firmware:*:*:*:*:*:*:*:*
omron cj2m-cpu11 firmwareall versionsnvdUScpe:2.3:o:omron:cj2m-cpu11_firmware:*:*:*:*:*:*:*:*
omron cj2m-cpu12 firmwareall versionsnvdUScpe:2.3:o:omron:cj2m-cpu12_firmware:*:*:*:*:*:*:*:*

showing 20 of 279

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2023-06-19modified 2026-06-17

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references (23)

External citations — patches, advisories, analysis.

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