CVE-2025-54811

highpriority · track · 0EPSS 0.002 · 11 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (11th) EPSS

CVSS 7.1 · high

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cisa_csaf_ot

EPSS · scored 2026-10-28

OpenPLC_V3 has a vulnerability in the enipThread function that occurs due to the lack of a return value. This leads to a crash when the server loop ends and execution hits an illegal ud2 instruction. This issue can be triggered remotely without authentication by starting the same server multiple times or if the server exits unexpectedly. The vulnerability allows an attacker to cause a Denial of Service (DoS) against the PLC runtime, stopping any PC started remotely without authentication. This results in the PLC process crashing and halting all automation or control logic managed by OpenPLC.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedOpenPLC_v3cisa_csaf_ot
Pull request #292 resolves this issue. Users are advised to update OpenPLC_V3 to pull request #292 or later from the main GitHub repository.
https://github.com/thiagoralves/OpenPLC_v3

cvss

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

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.1–7.1

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · CISA US

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ics-cert@hq.dhs.gov USexploitability 2.5 · impact 4

v4.06.1mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:Hsecondary · ENISA EU

v4.06.1mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · ics-cert@hq.dhs.gov US

v4.02.1lowCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-758USCWE-758US

affected products (3)

Products and version ranges known to be affected.

OpenPLC_V3 OpenPLC_V3: <pull_request_#292all versionscisa_csaf_otUS
OpenPLC_V3 OpenPLC_v3< pull_request_#292cisa_csaf_otUS
OpenPLC_V3 OpenPLC_v30 → pull request #292enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-25-273-05OpenPLC_V32025-09-30icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could cause a denial of service, making the PLC runtime process crash.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot NVD CVE.org MITRE

published 2025-10-01modified 2026-10-19

references (6)

External citations — patches, advisories, analysis.

scry

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