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.

Published 30 Jul 2026, 23:16 UTC Last modified 30 Jul 2026, 23:16 UTC

8.2

CVSS 4.0 HIGH base score

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack profile

The conditions required to exploit this vulnerability and its potential impact.

Attack vector Network

Attack complexity High

Privileges required None

User interaction None

Scope Not assessed

Confidentiality Not assessed

Integrity Not assessed

Availability Not assessed

Affected products

Product applicability statements supplied with the NVD record.

NVD has not published structured affected-product data for this record.

Weakness classification

CWE categories help security teams group the underlying software weakness.

CWECWE-191

Source references

External advisories, patches and technical reports attached to this CVE record.

NVD National Vulnerability Database recordnvd.nist.gov 01 Technical reference ics-cert@hq.dhs.gov 02 Technical reference ics-cert@hq.dhs.gov 03 Technical reference ics-cert@hq.dhs.gov 04 Technical reference ics-cert@hq.dhs.gov 05 Technical reference ics-cert@hq.dhs.gov 06 Technical reference ics-cert@hq.dhs.gov 07 Technical reference ics-cert@hq.dhs.gov