High severityNVD Advisory· Published Jun 15, 2026· Updated Jun 15, 2026

CVE-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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Wertheim/SafeController 5400llm-fuzzy
Range: = 6.11.8130.22320

Patches

Vulnerability mechanics

References

r.sec-consult.com/wertdevnvd
sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-wertheim-safecontroller-hardware-for-vault-rooms-safe-deposit-locker-system-microcontroller/nvd
wertheim-safes.com/safe-deposit-boxes/nvd

News mentions

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