CVE-2025-53476
published 2025-10-07CVE-2025-53476: A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted…
PriorityP430medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
0.34%
25.4th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| openplc | openplc_v3 | — | — |
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Talos
Open PLC and Planet vulnerabilities
blogs_talos·2025-10-15·CVSS 8.8
[HIGH] Open PLC and Planet vulnerabilities
## Open PLC and Planet vulnerabilities
Cisco Talos’ Vulnerability Discovery & Research team recently disclosed one vulnerability in the OpenPLC logic controller and four vulnerabilities in the Planet WGR-500 router.
For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org , and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website .
## OpenPLC denial-of-service vulnerability
Discovered by a member of Cisco Talos.
OpenPLC is an open-source programmable logic controller intended to provide a low cost industrial solution for automation and research.
Talos researchers found TALOS-2025-2223 (CVE-2025-53476), a denial-of-service vulnerability in the ModbusTCP server functionality of OpenPLC_v3
Talos
Open PLC and Planet vulnerabilities
blogs_talos·2025-10-15·CVSS 8.8
[HIGH] Open PLC and Planet vulnerabilities
Cisco Talos’ Vulnerability Discovery & Research team recently disclosed one vulnerability in the OpenPLC logic controller and four vulnerabilities in the Planet WGR-500 router.
For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org, and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website.
## OpenPLC denial-of-service vulnerability
Discovered by a member of Cisco Talos.
OpenPLC is an open-source programmable logic controller intended to provide a low cost industrial solution for automation and research.
Talos researchers found TALOS-2025-2223 (CVE-2025-53476), a denial-of-service vulnerability in the ModbusTCP server functionality of OpenPLC_v3. A specially crafted series of network co
2025-10-07
Published