What is CVE-2025-53476?

CVE-2025-53476 is a medium-severity vulnerability in Openplc Openplc_v3, classified under CWE-775. CVSS score: 5.3/10. Published 2025-10-07.

How severe is CVE-2025-53476?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2025-53476 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Openplc Openplc_v3

CVE-2025-53476

A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modb…

EPSS: 0.001 (27.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Openplc Openplc_v3 — versions a931181e8b81e36fadf7b74d5cba99b73c3f6d58

Weakness classification (CWE)

CWE-775

Public proof-of-concept exploits

References

https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223

Frequently asked questions

What is CVE-2025-53476?: CVE-2025-53476 is a medium-severity vulnerability in Openplc Openplc_v3, classified under CWE-775. CVSS score: 5.3/10. Published 2025-10-07.
How severe is CVE-2025-53476?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-53476 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.