High severity8.8NVD Advisory· Published Jul 30, 2026· Updated Sep 3, 2026
CVE-2026-65423
CVE-2026-65423
Description
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.jsonnvd
- github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179fnvd
- github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60nvd
- github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804envd
- github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97dfnvd
- www.cisa.gov/news-events/ics-advisories/icsa-26-211-08nvd
- www.o6-automation.com/contactnvd
News mentions
2- Open62541: Four Vulnerabilities Disclosed Together, Ranging Medium to High SeverityVypr Intelligence · Jul 30, 2026
- o6 Automation open62541CISA ICS Advisories