CVE-2025-54811
MEDIUM EPSS 9.9%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
6.1 CVSS 4.0
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/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 Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
9.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-758
References 2
- github.com https://github.com/thiagoralves/OpenPLC_v3
- cisa.gov https://www.cisa.gov/news-events/ics-advisories/icsa-25-273-05
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.