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 (v2.0.3)

CWE

CWE-294 - Authentication bypass by capture-replay

Assigner

SEC-VLab

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": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34021",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-15T13:10:35.328416Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-15T13:10:40.668Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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            "tags": [
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            "url": "https://sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-wertheim-safecontroller-hardware-for-vault-rooms-safe-deposit-locker-system-microcontroller/"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Wertheim SafeController 5400 Hardware for VAULT ROOMS (Safe Deposit Locker System - Microcontroller)",
          "vendor": "Wertheim GmbH",
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              "status": "affected",
              "version": "Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320"
            }
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        }
      ],
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          "type": "finder",
          "value": "Gorazd Jank, SEC Consult Vulnerability Lab"
        },
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          "type": "finder",
          "value": "Christian Hager, SEC Consult Vulnerability Lab"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Philipp Espernberger, SEC Consult Vulnerability Lab"
        }
      ],
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            }
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        }
      ],
      "impacts": [
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          "capecId": "CAPEC-594",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-594 Traffic Injection"
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        }
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      "metrics": [
        {
          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
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          "scenarios": [
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      "providerMetadata": {
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      "references": [
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          "url": "https://wertheim-safes.com/safe-deposit-boxes/"
        },
        {
          "tags": [
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          "url": "https://r.sec-consult.com/wertdev"
        }
      ],
      "solutions": [
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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."
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          "value": "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."
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      ],
      "source": {
        "discovery": "EXTERNAL"
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      "title": "Lack of cryptographic protection in Wertheim SafeController 5400 enables RS-485 message sniffing and replay",
      "workarounds": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Physically isolate all SafeController devices so that only authorized personnel can access them. Harden all connected systems that communicate via the serial interface, disable unnecessary services, and restrict access to authorized personnel only. Ensure that servers communicating with SafeController devices use strong, unique authentication credentials and are not accessible to unauthorized users. Maintain physical security of all interconnected components to prevent unauthorized access or tampering."
            }
          ],
          "value": "Physically isolate all SafeController devices so that only authorized personnel can access them. Harden all connected systems that communicate via the serial interface, disable unnecessary services, and restrict access to authorized personnel only. Ensure that servers communicating with SafeController devices use strong, unique authentication credentials and are not accessible to unauthorized users. Maintain physical security of all interconnected components to prevent unauthorized access or tampering."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "551230f0-3615-47bd-b7cc-93e92e730bbf",
    "assignerShortName": "SEC-VLab",
    "cveId": "CVE-2026-34021",
    "datePublished": "2026-06-15T10:02:09.049Z",
    "dateReserved": "2026-03-25T10:46:45.515Z",
    "dateUpdated": "2026-06-15T13:10:40.668Z",
    "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-4W8G-Q38J-GM8M

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

Tags

Sightings

Nomenclature