BaseFortify

Publication date: 2025-10-07

Last updated on: 2025-11-03

Assigner: Talos

Description

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 Scores

EPSS Scores

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Meta Information

Published

2025-10-07

Last Modified

2025-11-03

Generated

2026-07-06

AI Q&A

2025-10-07

EPSS Evaluated

2026-07-05

NVD

CVE-2025-53476

Affected Vendors & Products

Vendor	Product	Version / Range
openplc	openplc	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-775	The product does not release a file descriptor or handle after its effective lifetime has ended, i.e., after the file descriptor/handle is no longer needed.

Attack-Flow Graph

Executive Summary

This vulnerability is a denial of service issue in the ModbusTCP server functionality of OpenPLC v3. An attacker can send a specially crafted series of network connections that cause the server to stop processing further Modbus requests, effectively disrupting its normal operation.

Impact Analysis

The impact of this vulnerability is a denial of service condition where the ModbusTCP server becomes unresponsive to subsequent requests. This can disrupt industrial control processes relying on OpenPLC, potentially causing operational downtime or loss of availability.

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