Vulnerability record · CVE-2026-67870 · published 6 August 2026

CVE-2026-67870: NULL pointer dereference vulnerability

In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node pointer to remain NULL while execution continues.

9.8 CVSS 3.1 Critical EPSS 1.1% · top 36.7% CWE-476 · NULL pointer dereference Deferred

9.8CVSS 3.1 base score

1.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

31 Aug 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Link	Tags
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.c
https://github.com/open62541/open62541/blob/v1.5.5/src/ua_types.c
https://github.com/open62541/open62541/issues/8172
https://github.com/open62541/open62541/issues/8172

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed10 Feb 2026

Source: NIST National Vulnerability Database (record CVE-2026-67870), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.