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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.

PUBLISHED Reserved 2026-07-14 | Published 2026-07-14 | Updated 2026-07-14 | Assigner VulDB




LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
LOW: 3.1CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
2.1AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

NULL Pointer Dereference

Denial of Service

Timeline

2026-07-14:Advisory disclosed
2026-07-14:VulDB entry created
2026-07-14:VulDB entry last update

Credits

Chuan Wei finder

VULL (VulDB User) reporter

VULL (VulDB User) analyst

VulDB CNA Team coordinator

References

vuldb.com/vuln/378237 (VDB-378237 | open62541 Shared Client ua_client_connect.c responseReadNamespacesArray null pointer dereference) vdb-entry technical-description

vuldb.com/vuln/378237/cti (VDB-378237 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-15690 (CVE-2026-15690 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/855996 (Submit #855996 | open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b） out-of-bounds read) third-party-advisory

github.com/open62541/open62541/issues/8104 exploit issue-tracking

github.com/open62541/open62541/ product

cve.org (CVE-2026-15690)

nvd.nist.gov (CVE-2026-15690)

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