open62541 1.5.5 ua_client_connect.c responseReadNamespacesArray out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k1.85

Summaryinfo

A vulnerability categorized as critical has been discovered in open62541 1.5.5. This impacts the function responseReadNamespacesArray of the file src/client/ua_client_connect.c. Such manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2026-67857. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in open62541 1.5.5 and classified as critical. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-67857 since 07/30/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
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: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
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

07/30/2026 CVE reserved
08/04/2026 +5 days Advisory disclosed
08/04/2026 +0 days VulDB entry created
08/05/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-67857 (🔒)
GCVE (CVE): GCVE-0-2026-67857
GCVE (VulDB): GCVE-100-385988

Entryinfo

Created: 08/05/2026 00:00
Changes: 08/05/2026 00:00 (54)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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