CVE-2026-18784o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-122, CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
o6 open62541 open62541:open62541 | 1.5.0; 1.5.1; 1.5.2; 1.5.3; 1.5.4; 1.5.5 | CNA record |
References
- https://vuldb.com/vuln/385786vdb-entry, technical-description
- https://vuldb.com/vuln/385786/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-18784third-party-advisory
- https://vuldb.com/submit/857012third-party-advisory
- https://github.com/open62541/open62541/issues/8139issue-tracking
- https://github.com/gff-cw/information/issues/11exploit, issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.