CVE-2026-34021
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
ProductWertheim SafeController 5400 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller)
PublishedJun 15, 2026
First seenJun 15, 2026
Weakness typeCWE-294CWE-294
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Wertheim GmbH Wertheim SafeController 5400 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller) | Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320 | — |
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