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.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-23b21104ef advisory.

    Update to 1.5.6

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1435f05fde advisory.

    Update to 1.5.6

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-15690)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
332081	Fedora 44 : open62541 (2026-23b21104ef)	Nessus	Fedora Local Security Checks	low
332079	Fedora 43 : open62541 (2026-1435f05fde)	Nessus	Fedora Local Security Checks	low
327139	Linux Distros Unpatched Vulnerability : CVE-2026-15690	Nessus	Misc.	low

Detections

Analytics

CVE-2026-15690

low

Tenable Plugins

low

low

low