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VulnerabilityCVE-2026-65423Published 2026-07-30

CVE-2026-65423 — o6 Automation open62541

high

As of 2026-07-31, CVE-2026-65423 is a HIGH-severity vulnerability in o6 Automation open62541, CVSS v3.1 8.8, EPSS 0.6% (45.5th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-65423 as of 2026-07-31; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
8.8/10High
EPSS
0.6%Higher than 45.5% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
6.2/10Threadlinqs triage score
Published
Updated 2026-07-31
CVSS v3.1 8.8 (HIGH) · CVSS v4.0 8.7 · EPSS 0.6% (higher than 45.5% of all scored CVEs) · Priority 6.2/10 · Published 2026-07-30

Last updated:

What is CVE-2026-65423?

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

The record classifies CVE-2026-65423 under weakness class CWE-190. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 67 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0 base score
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS (FIRST)
0.6% probability of exploitation in the next 30 days, higher than 45.5% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
6.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-07-30, last modified 2026-07-31

Is CVE-2026-65423 being exploited?

It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

  • o6 Automation: open62541

How to fix CVE-2026-65423

No vendor patch reference has been recorded for CVE-2026-65423 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-65423

No threat campaign in the Threadlinqs corpus currently references CVE-2026-65423, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Showing 5 of 7 recorded references.