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o6 Automation open62541
CVE-2026-63362CVE-2026-65423CVE-2026-63035CVE-2026-63559
July 30, 2026 · CISA (US-CERT) · Severity: CRITICAL
CISA disclosed multiple vulnerabilities in o6 Automation's open62541 OPC UA implementation, including integer underflow, overflow, and use-after-free flaws. Successful exploitation could lead to sensitive information disclosure, denial of service, or arbitrary code execution. Users are advised to contact o6 Automation for updated versions to remediate these issues.
Key Takeaways
- Multiple vulnerabilities in open62541 OPC UA stack could allow information disclosure or code execution.
- Affected versions include 1.3.0 through 1.5.4 and master branch on Windows and Linux.
- o6 Automation recommends updating to the newest version to mitigate the risks.