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Vulnerability record · CVE-2024-36981 · published 18 September 2024

CVE-2024-36981: Openplcproject openplc v3 firmware out-of-bounds read vulnerability

Openplcproject · Openplc V3 Firmware

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.

7.5 CVSS 3.1 High EPSS 1.0% · top 38.0% CWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2024-2004 ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-2004

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-34026Openplcproject openplc v3 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability exists in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC _v3 b4702061dc14d1024856f71b454…EPSS 2.4%9.8CVE-2018-20818Openplcproject openplc v2 firmware memory buffer overflow vulnerabilityA buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapU…EPSS 1.5%9.2CVE-2026-35556Openplcproject openplc v3 firmware vulnerabilityOpenPLC_V3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive…EPSS 0.40%9.2CVE-2026-28205Openplcproject openplc v3 firmware insecure default initialization vulnerabilityOpenPLC_V3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to th…EPSS 0.67%8.8CVE-2021-31630Openplcproject openplc v3 firmware code injection vulnerabilityCommand Injection in Open PLC Webserver v3 allows remote attackers to execute arbitrary code via the "Hardware Layer Code Box" component on the "/har…EPSS 27%8.7CVE-2026-35063Openplcproject openplc v3 firmware missing authorization vulnerabilityOpenPLC_V3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other…EPSS 0.43%7.5CVE-2024-39589Openplcproject openplc v3 firmware vulnerabilityMultiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC_v3 16bf8bac1a36d95b73e7…EPSS 1.0%7.5CVE-2024-39590Openplcproject openplc v3 firmware vulnerabilityMultiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC_v3 16bf8bac1a36d95b73e7…EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-2024-36981), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.