Out-of-bounds read in OpENer EtherNet/IP ForwardOpen parser
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 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
OpENer v2.3/commit 76b95cf contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser (CWE-125). A remote attacker who needs no privileges or user interaction can cause a denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
OpENer v2.3/commit 76b95cf, contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser. 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 OpENer.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Vendor assessments
Timeline
- 2026-10-10 Threatist record created from CVE-2026-75351
- 2026-10-10 Affected versions changed · Red Hat
- 2026-10-10 CVSS score added · Red Hat
- 2026-10-10 Alias added: GHSA-h7x2-h7jp-5m95
References
Sources
- CVE-2026-75351 · CVE Program
- CVE-2026-75351 · NVD
- FIRST EPSS
- GHSA-h7x2-h7jp-5m95 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-75351 · 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