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CVE-2025-54811

OpenPLC_V3

Medium6.1EPSS 0.21%
Published
Updated
Reserved
Assigned by
icscert

Description

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.

Scores

CVSS scores of CVE-2025-54811, by who scored it
Scored byCVSSScoreVector
icscertCNA (assigner)4.0Medium6.1CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H
icscertCNA (assigner)3.1High7.1CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVDNVD · Deferred4.0Medium6.1CVSS: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:X
EPSS (exploitation in 30 days)
0.21% · top 89% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

Affected products

What to do

Solution: 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 .

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .