Is CVE-2019-6840 actively exploited?

No active exploitation of CVE-2019-6840 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-6840 be exploited remotely?

Yes. CVE-2019-6840 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-6840?

CVE-2019-6840 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2019-6840

CWE-134Published: September 17, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A Format String: CWE-134 vulnerability exists in U.motion Server (MEG6501-0001 - U.motion KNX server, MEG6501-0002 - U.motion KNX Server Plus, MEG6260-0410 - U.motion KNX Server Plus, Touch 10, MEG6260-0415 - U.motion KNX Server Plus, Touch 15), which could allow an attacker to send a crafted message to the target server, thereby causing arbitrary commands to be executed.

NVD Source

Technical Analysis

CVE-2019-6840 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.