CVE-2019-6840

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-17 · updated 2026-06-17
Weakness: CWE-134

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.

Affected products

Schneider-Electric Meg6260-0410 Firmware: before 1.3.7 — fixed in 1.3.7
Schneider-Electric Meg6260-0415 Firmware: before 1.3.7 — fixed in 1.3.7
Schneider-Electric Meg6501-0001 Firmware: before 1.3.7 — fixed in 1.3.7
Schneider-Electric Meg6501-0002 Firmware: before 1.3.7 — fixed in 1.3.7

How to fix

Upgrade to a fixed version: Schneider-Electric Meg6260-0410 Firmware 1.3.7; Schneider-Electric Meg6260-0415 Firmware 1.3.7; Schneider-Electric Meg6501-0001 Firmware 1.3.7; Schneider-Electric Meg6501-0002 Firmware 1.3.7. Check the vendor advisory for mitigations.

References

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