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

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-25)

CWE

CWE-775

Published

2025-10-07

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

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

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