CVE-2026-67857: High severity open62541 open62541 vulnerability
Published Aug 4, 2026
·Updated
open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/uaclientconnect.c.
Affected Software
1 affected component
open62541 open62541=1.5.5
Event History
Aug 4, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverity
Data Sourced
via NVD·10:17 PM
DescriptionSeverity
Frequently Asked Questions
1
What is the severity of CVE-2026-67857?
The severity of CVE-2026-67857 is classified as high with a score of 7.5.
2
What vulnerability does CVE-2026-67857 describe?
CVE-2026-67857 describes an out-of-bounds read vulnerability in the client-side function responseReadNamespacesArray() of open62541 version 1.5.5.
3
How does CVE-2026-67857 impact systems using open62541?
CVE-2026-67857 can potentially allow unauthorized access to sensitive data due to the out-of-bounds read issue.
4
How can I fix CVE-2026-67857?
To fix CVE-2026-67857, update to the latest version of open62541 that addresses this vulnerability.
5
Is there a workaround for CVE-2026-67857?
There is no specific workaround provided for CVE-2026-67857; the recommended action is to upgrade to a patched version.