What is CVE-2026-63362?

CVE-2026-63362 is a medium-severity vulnerability in O6 Automation Open62541, classified under Integer Underflow. CVSS score: 5.9/10. Published 2026-07-30.

How severe is CVE-2026-63362?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Integer overflow in O6 Automation Open62541

CVE-2026-63362

An unsigned integer underflow in the PubSub signature verification path in open62541 may allow a remote attacker to cause a denial of service via a crafted UDP packet.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

O6 Automation Open62541 — versions 1.3.0, 1.4.0, 1.5.0

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov

Frequently asked questions

What is CVE-2026-63362?: CVE-2026-63362 is a medium-severity vulnerability in O6 Automation Open62541, classified under Integer Underflow. CVSS score: 5.9/10. Published 2026-07-30.
How severe is CVE-2026-63362?: Medium severity. CVSS v3 base score is 5.9 out of 10.