CVE-2025-54811

OpenPLC_V3

Published Oct 1, 2025 CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor 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 .

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-32044 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Openplcproject
Openplcproject openplc V3
Openplcproject openplc V3 Firmware
Vendors & Products Openplcproject
Openplcproject openplc V3
Openplcproject openplc V3 Firmware
Type Values Removed Values Added
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.
Title OpenPLC_V3
Weaknesses CWE-758
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 2, 2025, 3:53 PM
Reserved
Sep 23, 2025, 7:54 PM
Status
Deferred
Published
Oct 1, 2025, 10:15 PM
Modified
Oct 19, 2026, 5:10 PM