CVE-2026-63362

5.9 MEDIUM

Published: July 30, 2026 Modified: July 30, 2026

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json

Source: ics-cert@hq.dhs.gov

https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f

Source: ics-cert@hq.dhs.gov

https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60

Source: ics-cert@hq.dhs.gov

https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e

Source: ics-cert@hq.dhs.gov

https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df

Source: ics-cert@hq.dhs.gov

https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08

Source: ics-cert@hq.dhs.gov

https://www.o6-automation.com/contact

Source: ics-cert@hq.dhs.gov

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

5.9 / 10.0

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-191

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