CVE-2026-75350 EIPStackGroup CVE debrief

Who should care

Defenders responsible for systems using EIPStackGroup OpENer should assess exposure and prioritize verification and patching of affected systems. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review compensating controls for exposed systems while remediation is scheduled and verified. They should also review relevant monitoring, detection, and logs for exposed assets that need extra review.

Why it matters

CVE-2026-75350 is a high-severity buffer overflow vulnerability in EIPStackGroup OpENer that allows remote denial of service attacks. Defenders should prioritize verification, patching, and monitoring of affected systems.

• Denial of service vulnerability requires verification and patching of affected systems
• High CVSS score of 7.5 indicates significant vulnerability
• Remote exploitation possible, requiring network traffic monitoring

Technical summary

The vulnerability is caused by a buffer overflow in the GetAttributeList() implementation for the EtherNet/IP Get_Attribute_List service in EIPStackGroup OpENer v2.3 / master commit 76b95cf. This allows a remote attacker to cause a denial of service. The vulnerability has a high CVSS score of 7.5, indicating significant vulnerability. Defenders should prioritize verifying and patching affected systems, as well as monitoring network traffic for potential exploitation attempts. The CVE record and source item provide details about the vulnerability, including its description, CVSS score, and affected versions.

Defensive priority

Defenders should prioritize verifying and patching affected systems, as this vulnerability has a high CVSS score of 7.5 and can lead to a denial of service.

Recommended defensive actions

• Verify and patch affected systems
• Monitor network traffic for potential exploitation attempts
• Implement compensating controls to mitigate potential impact
• Review relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and source item provide details about the vulnerability, including its description, CVSS score, and affected versions. However, the vendor and affected versions are not clearly specified, requiring further verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.