CVE.RADIO
FREN

CVE-2026-65423

o6 Automation open62541VulnerabilityCVSS 8.7

An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write.

No public exploitation has been reported so far. No distribution fix is listed yet; apply vendor mitigations and monitor.

Recommended action: Track your distribution's security tracker and apply the fix as soon as it ships.

CVE-2026-65423 o6 Automation open62541 Vulnerability

Severity metrics

CVSS 4.0 : 8.7 HIGH · CVSS 3.1 : 8.8 HIGH

Attack vectorNetwork (remote)
Attack complexityLow
Attack requirementsNone
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Subsequent confidentialityNone
Subsequent integrityNone
Subsequent availabilityNone

Vector: AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected & fixed versions by distribution

Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.

No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.

Sources

Advisory NVD CVE.org

Other vulnerabilities in o6 Automation open62541

Published 2026-07-30 · updated 2026-07-31 · source: NVD