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Vulnerabilities

OpenPLC Project OpenPLC v3 Firmware

Ranked by severity, then by exploit likelihood. Click a CVE ID for its full record.

12CVEs
CVE-2024-34026
A stack-based buffer overflow vulnerability exists in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC _v3 b4702061dc14d1024856f71b4543298d77007b88. A specially crafted EtherNet/IP request can lead to remote code execution. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.
Published 2024-09-18 · Modified
9.8EPSS 0.024
CVE-2018-20818
A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapUnusedIO() function, which can cause a runtime crash of the PLC or possibly have unspecified other impact.
Published 2019-04-21 · Modified
9.8EPSS 0.015
CVE-2026-28205
Initialization of a resource with an insecure default in OpenPLC_V3
Published 2026-04-09 · Analyzed
9.8EPSS 0.007
CVE-2026-35556
Plaintext storage of a password in OpenPLC_V3
Published 2026-04-09 · Analyzed
9.2EPSS 0.004
CVE-2021-31630
Command Injection in Open PLC Webserver v3 allows remote attackers to execute arbitrary code via the "Hardware Layer Code Box" component on the "/hardware" page of the application.
Published 2021-08-03 · Modified
9.0EPSS 0.271
CVE-2026-35063
Missing Authorization in OpenPLC_V3
Published 2026-04-09 · Analyzed
8.8EPSS 0.004
CVE-2024-36980
An out-of-bounds read vulnerability exists in the OpenPLC Runtime EtherNet/IP PCCC parser functionality of OpenPLC_v3 b4702061dc14d1024856f71b4543298d77007b88. A specially crafted network request can lead to denial of service. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.This is the first instance of the incorrect comparison.
Published 2024-09-18 · Modified
7.5EPSS 0.011
CVE-2024-36981
An out-of-bounds read vulnerability exists in the OpenPLC Runtime EtherNet/IP PCCC parser functionality of OpenPLC_v3 b4702061dc14d1024856f71b4543298d77007b88. A specially crafted network request can lead to denial of service. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.This is the final instance of the incorrect comparison.
Published 2024-09-18 · Modified
7.5EPSS 0.010
CVE-2024-39589
Multiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC_v3 16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a. A specially crafted EtherNet/IP request can lead to denial of service. An attacker can send a series of EtherNet/IP requests to trigger these vulnerabilities.This instance of the vulnerability occurs within the `Protected_Logical_Read_Reply` function
Published 2024-09-18 · Modified
7.5EPSS 0.010
CVE-2024-39590
Multiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC_v3 16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a. A specially crafted EtherNet/IP request can lead to denial of service. An attacker can send a series of EtherNet/IP requests to trigger these vulnerabilities.This instance of the vulnerability occurs within the `Protected_Logical_Write_Reply` function
Published 2024-09-18 · Modified
7.5EPSS 0.010
CVE-2026-31156
A path injection vulnerability exists in OpenPLC v3 (2c82b0e79c53f8c1f1458eee15fec173400d6e1a) as the binary program compiled from glue_generator.cpp does not perform any validation on the file path parameters passed via the command line. The user-controlled input parameters are directly passed to the underlying file operation functions (fopen/ifstream/ofstream) for file reading and writing. An attacker can exploit this vulnerability by constructing a malicious path to read arbitrary readable files.
Published 2026-05-13 · Modified
6.5EPSS 0.005
CVE-2024-37741
OpenPLC 3 through 9cd8f1b allows XSS via an SVG document as a profile picture.
Published 2024-06-28 · Modified
5.4EPSS 0.003