CVE-2026-18784 (GCVE-0-2026-18784)
Vulnerability from cvelistv5 – Published: 2026-08-04 16:30 – Updated: 2026-08-05 14:55
VLAI
EPSS
VEX
Title
o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:55 UTC
Assigner
VulDB
CNA
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/385786 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/385786/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-18784 | third-party-advisory |
| https://vuldb.com/submit/857012 | third-party-advisory |
| https://github.com/open62541/open62541/issues/8139 | issue-tracking |
| https://github.com/gff-cw/information/issues/11 | exploitissue-tracking |
Impacted products
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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