Vulnerability-Lookup

GHSA-4W8G-Q38J-GM8M

Vulnerability from github – Published: 2026-06-15 12:32 – Updated: 2026-06-15 15:31

Details

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.

Severity

8.6 (High)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-34021"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-294"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-15T12:16:24Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-4w8g-q38j-gm8m",
  "modified": "2026-06-15T15:31:31Z",
  "published": "2026-06-15T12:32:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34021"
    },
    {
      "type": "WEB",
      "url": "https://r.sec-consult.com/wertdev"
    },
    {
      "type": "WEB",
      "url": "https://sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-wertheim-safecontroller-hardware-for-vault-rooms-safe-deposit-locker-system-microcontroller"
    },
    {
      "type": "WEB",
      "url": "https://wertheim-safes.com/safe-deposit-boxes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-34021 (GCVE-0-2026-34021)

Vulnerability from cvelistv5 – Published: 2026-06-15 10:02 – Updated: 2026-06-15 13:10

Title

Lack of cryptographic protection in Wertheim SafeController 5400 enables RS-485 message sniffing and replay

Summary

Severity

8.6 (High)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-15 13:10 UTC

CWE

CWE-294 - Authentication bypass by capture-replay

Assigner

SEC-VLab CNA under the mitre root

CNA scorecard B 81/100 over 22 records in the last 180 days details

References

3 references

URL	Tags
https://wertheim-safes.com/safe-deposit-boxes/	product
https://r.sec-consult.com/wertdev	third-party-advisory
https://sec-consult.com/vulnerability-lab/advisor…	exploit

Impacted products

1 product

Vendor	Product	Version
Wertheim GmbH	Wertheim SafeController 5400 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller)	Affected: Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320

Credits

Gorazd Jank, SEC Consult Vulnerability Lab Christian Hager, SEC Consult Vulnerability Lab Philipp Espernberger, SEC Consult Vulnerability Lab

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JSON

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  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34021",
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                  },
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                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-15T13:10:35.328416Z",
                "version": "2.0.3"
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          }
        ],
        "title": "CISA ADP Vulnrichment"
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            }
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        }
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    "datePublished": "2026-06-15T10:02:09.049Z",
    "dateReserved": "2026-03-25T10:46:45.515Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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