Expired pointer dereference in OpENer EtherNet/IP packet handling
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.
Summary
EIPStackGroup OpENer v2.3 and master up to commit 76b95cf are affected. The EtherNet/IP Common Packet Format handling dereferences an expired pointer (CWE-400). A remote attacker without privileges or user interaction can cause a denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
Description from the CNA
EIPStackGroup OpENer v2.3 and master up to commit 76b95cf contain an expired pointer dereference vulnerability in the EtherNet/IP Common Packet Format (CPF) handling logic. This allows a remote attacker to cause a denial of service.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for EIPStackGroup OpENer.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
Vendor assessments
Timeline
- 2026-10-10 Threatist record created from CVE-2026-75347
- 2026-10-11 Priority changed: MEDIUM → LOW
- 2026-10-13 Weakness changed · CISA ADP
- 2026-10-13 CISA SSVC decision points changed
- 2026-10-13 Priority changed: LOW → HIGH
- 2026-10-13 Alias added: GHSA-cmxj-3q64-8hph
- 2026-10-30 Affected versions changed · Red Hat
- 2026-10-30 CVSS score added · Red Hat
References
Other 4
- https://github.com/EIPStackGroup/OpENer/issues/575
- https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/cpf.c
- https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/encap.c
- https://github.com/EIPStackGroup/OpENer/blob/master/source/src/ports/generic_networkhandler.c
Sources
- CVE-2026-75347 · CVE Program
- CVE-2026-75347 · NVD
- FIRST EPSS
- GHSA-cmxj-3q64-8hph · GitHub Advisory Database · CC BY 4.0
- CVE-2026-75347 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences