CVE-2026-67864 open62541 CVE debrief

Who should care

Organizations using open62541 v.1.5.5 and before should be aware of this vulnerability and take steps to mitigate it. This includes reviewing their deployments, applying patches or upgrades, and verifying the effectiveness of their security controls. Security teams and vulnerability management teams should prioritize this vulnerability and coordinate with operators and platform teams to ensure timely remediation.

Technical summary

A denial of service vulnerability exists in open62541 v.1.5.5 and before via the NodeManagement type-instantiation logic component. This issue allows a remote attacker to cause a denial of service. Organizations using open62541 v.1.5.5 and before should prioritize patching to prevent potential denial of service attacks. The vulnerability affects the NodeManagement type-instantiation logic component of open62541. Limited evidence is available, and organizations should review official advisories for affected scope and vendor guidance.

Defensive priority

Organizations using open62541 v.1.5.5 and before should prioritize patching to prevent potential denial of service attacks.

Recommended defensive actions

• Inventory and verify open62541 version
• Apply vendor patch or upgrade to a fixed version
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check 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

Evidence is limited; primary official records indicate a denial of service vulnerability in open62541 v.1.5.5 and before via the NodeManagement type-instantiation logic component. Organizations should verify their deployments and review official advisories for affected scope and vendor guidance.

Official resources