CVE-2026-65423: open62541 1.3.0 through 1.3.17, 1.4.0 through 1.4.16, 1.5.0 through 1.5.4, master

CVE-2026-65423. CVSS 3.1 base score 8.8 (HIGH, Vendor/CNA). EPSS 0.00799 (percentile 0.56081), scored 22-Oct-2026.

Affected technology

open62541 · 1.3.0 through 1.3.17, 1.4.0 through 1.4.16, 1.5.0 through 1.5.4, master
o6 Automation

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

A remote attacker may trigger an out-of-bounds write. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality, integrity and availability impact as high.

Published 24-Oct-2026 01:43 UTC

CWE: CWE-190
CCR priority: 35.4 /100 (P4)
CVSS 3.1: 8.8 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
EPSS: 0.00799 · percentile 0.56081 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-65423.html