open62541 up to 1.5.5 Shared Client Library ua_client_connect.c responseReadNamespacesArray Server_NamespaceArray null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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2.8$0-$5k2.05

Summaryinfo

A vulnerability classified as problematic has been found in open62541 up to 1.5.5. This affects the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Performing a manipulation of the argument Server_NamespaceArray results in null pointer dereference. This vulnerability is reported as CVE-2026-15690. The attack is possible to be carried out remotely. Moreover, an exploit is present. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Detailsinfo

A vulnerability, which was classified as problematic, was found in open62541 up to 1.5.5. This affects the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. The manipulation of the argument Server_NamespaceArray with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The weakness was disclosed by Chuan Wei (weicrsec) as 8104 as not defined issue (GitHub). The advisory is shared at github.com. The public release happened without involvement of the project team. This vulnerability is uniquely identified as CVE-2026-15690. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

A public exploit has been developed by Chuan Wei (weicrsec) in ANSI C. The exploit is shared for download at github.com. It is declared as proof-of-concept. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 2.8

VulDB Base Score: 3.1
VulDB Temp Score: 2.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Author: Chuan Wei (weicrsec)
Programming Language: 🔒
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/14/2026 Advisory disclosed
07/14/2026 +0 days VulDB entry created
07/14/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 8104
Researcher: Chuan Wei (weicrsec)
Status: Not defined

CVE: CVE-2026-15690 (🔒)
GCVE (CVE): GCVE-0-2026-15690
GCVE (VulDB): GCVE-100-378237
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/14/2026 07:00
Updated: 07/14/2026 07:19
Changes: 07/14/2026 07:00 (58), 07/14/2026 07:19 (14)
Complete: 🔍
Submitter: VULL
Committer: VULL
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #855996: open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b） out-of-bounds read (by VULL)

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