CVE-2025-53476 - CVE House
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Status published Medium CVE-2025-53476

A denial of service vulnerability exists in the ModbusTCP server...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Discovered by a member of Cisco Talos.

References

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Critical 9

Affected Vendor

Affected Software

OpenPLC_v3
Vulnerable Versions:
a931181e8b81e36fadf7b74d5cba99b73c3f6d58

Timeline

Official Publish: October 7th, 2025
Last Modified: November 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-775

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.