CVE-2026-34021EPSS p9.4%

CVE-2026-34021CVE-2026-34021

Description

The Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320, uses RS-485 communication between the server and the microcontroller without cryptographic protection. An attacker with access to the communication path between the server and the microcontroller can sniff RS-485 messages and replay previously observed messages. This can be used, for example, to spoof a "quit alarm" message and continuously deactivate the safe alarm.

Scoring

EPSS0.20% probability of exploitation · percentile 9.4% · 2026-06-17T12:03:21Z
Last modified2026-06-15
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.