Medium 5.3Published Oct 7, 2025

CVE-2025-53476A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58.

Updated under an hour ago (Oct 27, 2026, 7:50 AM ET)

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It affects OpenPLC_v3. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-775
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: talos
NVD analysis: Deferred
Record last updated: Nov 3, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OpenPLC OpenPLC_v3 openplc:v3 (from the name)	a931181e8b81e36fadf7b74d5cba99b73c3f6d58	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.