01 Record
CVE-2026-34021
Lack of cryptographic protection in Wertheim SafeController 5400 enables RS-485 message sniffing and replay
HighPUBLISHEDCNA: SEC-VLab
CNA base score8.6 CVSS v4.0CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
02 Description
Lack of cryptographic protection in Wertheim SafeController 5400 enables RS-485 message sniffing and replay
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.19% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 9.2% of scored records. A rank, not a probability.
- NVD base score
- 8.6 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-25.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-06-15 10:02Z4 MO AGO
- Last updated
- 2026-06-15 13:10Z4 MO AGO
- Reserved
- 2026-03-25
- Assigning CNA
- SEC-VLab
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.6)
- CNA CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Weaknesses
- CWE-294Authentication Bypass by Capture-replayBase
- Data version
- 5.2
- Document digest
- 06b6dcf48f9a2be5f0e90ef85f43442299543e54866b1c8241abe82a6bee53e9
05 Affected products
VendorProductVersionsPlatforms
Wertheim GmbHWertheim SafeController 5400 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller)Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320—
06 References
- wertheim-safes.comhttps://wertheim-safes.com/safe-deposit-boxes/
- r.sec-consult.comhttps://r.sec-consult.com/wertdev
- sec-consult.comhttps://sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-wertheim-safecontroller-hardware-for-vault-rooms-safe-deposit-locker-system-microcontroller/
07 Remediation
No fix is available for this issue. The affected SafeController 5400 is end-of-life (EOL), and the vendor stated that no patch will be provided. Affected parties should assess the business risk and switch to a supported version if EOL products are in use.