VULNERABILITY INTELLIGENCE

CVE-2021-37740

CVSS score7.5 HIGH

EPSS probability4.62%

CISA KEVNot currently listed

Published2022-04-20

Last modified2026-06-17

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

Description

A denial of service vulnerability exists in MDT's firmware for the KNXnet/IP Secure router SCN-IP100.03 and KNX IP interface SCN-IP000.03 before v3.0.4, that allows a remote attacker to turn the device unresponsive to all requests on the KNXnet/IP Secure layer, until the device is rebooted, via a SESSION_REQUEST frame with a modified total length field.

Primary references

cve@mitre.org — Exploit, Release Notes, Third Party Advisory
cve@mitre.org — Broken Link
cve@mitre.org — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Broken Link
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory