Integer overflow in O6 Automation Open62541

CVE-2026-63559

An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-63559?
CVE-2026-63559 is a high-severity vulnerability in O6 Automation Open62541, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-07-30.
How severe is CVE-2026-63559?
High severity. CVSS v3 base score is 7.5 out of 10.