CVE-2017-16718: Beckhoff Twincat

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Beckhoff TwinCAT 3 supports communication over ADS. ADS is a protocol for industrial automation in protected environments. This protocol uses user configured routes, that can be edited remotely via ADS. This special command supports encrypted authentication with username/password. The encryption uses a fixed key, that could be extracted by an attacker. Precondition of the exploitation of this weakness is network access at the moment a route is added.

Affected products

• Beckhoff Twincat: version 3.0 only

Published 2018-06-27. Last modified 2026-06-17.