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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.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
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

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.