CVE-2026-15690: NULL Pointer Dereference in open62541
A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
AI Analysis
Technical Summary
CVE-2026-15690 is a vulnerability in open62541 up to version 1.5.5 affecting the responseReadNamespacesArray function in src/client/ua_client_connect.c. The vulnerability arises from improper handling of the Server_NamespaceArray argument, leading to a NULL pointer dereference. This can be triggered remotely but requires a high complexity attack vector. The project has not issued an official fix and closed the issue report citing improper vulnerability reporting procedures. No vendor advisory or patch is currently available.
Potential Impact
Successful exploitation of this vulnerability can cause a NULL pointer dereference, likely resulting in a denial of service (application crash). There is no indication of privilege escalation, data disclosure, or code execution. The attack complexity is high, and no known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is available and the project has not acknowledged the vulnerability through an official channel, users should monitor for updates from the open62541 project. Until a fix is released, cautious use and limiting exposure to untrusted servers may reduce risk.
CVE-2026-15690: NULL Pointer Dereference in open62541
Description
A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
CVSS v4.0
Score 2.3low
Affected software
pkg:github/open62541/open62541cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15690 is a vulnerability in open62541 up to version 1.5.5 affecting the responseReadNamespacesArray function in src/client/ua_client_connect.c. The vulnerability arises from improper handling of the Server_NamespaceArray argument, leading to a NULL pointer dereference. This can be triggered remotely but requires a high complexity attack vector. The project has not issued an official fix and closed the issue report citing improper vulnerability reporting procedures. No vendor advisory or patch is currently available.
Potential Impact
Successful exploitation of this vulnerability can cause a NULL pointer dereference, likely resulting in a denial of service (application crash). There is no indication of privilege escalation, data disclosure, or code execution. The attack complexity is high, and no known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is available and the project has not acknowledged the vulnerability through an official channel, users should monitor for updates from the open62541 project. Until a fix is released, cautious use and limiting exposure to untrusted servers may reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-07-14T04:55:16.031Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56290168715ace43779865
Added to database: 07/14/2026, 12:18:09 UTC
Last enriched: 07/14/2026, 12:32:29 UTC
Last updated: 07/15/2026, 02:51:20 UTC
Views: 11
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