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Vulnerabilities CVE-2026-18784

CVE-2026-18784

Medium
Open
TLP:CLEAR

o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow

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Description

A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Details

CVSS Score
4.8
EPSS Score
0.12%

2.5th percentile

CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Confidence
90%
Published
Aug 4, 2026
Last Modified
Aug 5, 2026
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