CVE-2024-39589 Null dereference in OpenPLC v3

What is CVE-2024-39589?

CVE-2024-39589 is a high-severity vulnerability in OpenPLC_v3, published on 18 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

Weakness: CWE-704

Which versions are affected by CVE-2024-39589?

It affects 1 product.

Products include Openplcproject Openplc V3 Firmware.

How do I fix CVE-2024-39589?

No fix has been published for CVE-2024-39589 yet. Limit exposure of the affected software until one is available.

Is CVE-2024-39589 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-39589 exists.

Other vulnerabilities in OpenPLC_v3

• CVE-2026-28205 Initialization of a resource with an insecure default in OpenPLC_V3 Critical 9.2
• CVE-2026-35556 Plaintext storage of a password in OpenPLC_V3 Critical 9.2
• CVE-2024-34026 Memory corruption in OpenPLC v3 Critical 9.0
• CVE-2021-31630 Command injection in n/a High 8.8
• CVE-2026-35063 Missing Authorization in OpenPLC_V3 High 8.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x6fp-542m-2mr8.