Is CVE-2026-38719 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-38719 being exploited in the wild.

How severe is CVE-2026-38719?

Medium severity, with a CVSS score of 6.2, published 18 May 2026.

Which products and versions are affected?

EIPStackGroup OpENer v2.3-558-g1e99582.

Is there a fix for CVE-2026-38719?

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-2026-38719 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-38719?

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.

CVE-2026-38719: EIPStackGroup OpENer out-of-bounds read in CPF parser

CVE-2026-38719 · Severity: medium · CVSS 6.2 · Published 2026-05-18

OpENer is an open-source software stack used by industrial devices to communicate over EtherNet/IP networks. A security flaw in how the software handles incoming data packets could allow an attacker to crash the device by sending a specially crafted message. This could lead to a loss of communication or control in industrial environments, potentially disrupting operations.

Technologies: EIPStackGroup OpENer. Vendors: EIPStackGroup.

Quick answers

Is CVE-2026-38719 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-38719 being exploited in the wild.
How severe is CVE-2026-38719?: Medium severity, with a CVSS score of 6.2, published 18 May 2026.
Which products and versions are affected?: EIPStackGroup OpENer v2.3-558-g1e99582.
Is there a fix for CVE-2026-38719?: 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-2026-38719 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-38719?: 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

An out-of-bounds read vulnerability exists in the CreateCommonPacketFormatStructure() function within source/src/enet_encap/cpf.c of OpENer. The vulnerability is caused by insufficient validation of the 'item_count' field in the Common Packet Format (CPF) header against the actual length of the data slice. An attacker can provide a large, malicious item_count value, causing the parser to continue reading structured fields beyond the allocated buffer (cpf_start + data_length). While the CVSS vector provided by CISA-ADP suggests a local attack vector (AV:L), the component is part of a network encapsulation layer (ENIP/CPF), typically reachable over the network. Exploitation leads to a denial-of-service (crash) via a heap-buffer-overflow.

Affected products

EIPStackGroup OpENer v2.3-558-g1e99582

Timeline

2026-03-25: other: Issue reported on GitHub
2026-05-18: advisory: CVE published and NVD record created

References

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