Quick answers
- Is CVE-2026-75349 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-75349 being exploited in the wild.
- How severe is CVE-2026-75349?
- High severity, with a CVSS score of 7.5, published 9 October 2026.
- Which products and versions are affected?
- EIPStackGroup OpENer v2.3.0 and master branch up to commit 76b95cf.
- Is there a fix for CVE-2026-75349?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-75349 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-75349?
- Check whether you run EIPStackGroup OpENer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an out-of-bounds read in cipconnectionmanager.c request parsing code, accessible remotely via EtherNet/IP protocol messages. No authentication is required to trigger the flaw. An attacker can craft a malicious request that causes the process to read beyond allocated buffer boundaries, resulting in denial of service through crash or undefined behavior.
Affected products
- EIPStackGroup OpENer v2.3.0 and master branch up to commit 76b95cf
Timeline
- 2026-10-09: disclosed