Vulnerability-Lookup

FKIE_CVE-2026-54213

Vulnerability from fkie_nvd - Published: 2026-08-07 10:16 - Updated: 2026-09-07 13:20

Severity

9.2 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Summary

Tobit Laboratories AG TeamDavid's Webbox application exposes a functionality that allows the server to be shut down when a specific endpoint (/internalRestart) is accessed. This endpoint is accessible to unauthenticated users over the public Internet. Instead of “restarting”, the server shuts completely down. As a result, a remote attacker can trigger a persistent denial of service by shutting down the web server without requiring authentication. Recovery requires manual administrator intervention to restart the service. This issue affects TeamDavid before Rollout 528. Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

References

	URL	Tags
	vulnerability@ncsc.ch	https://chayns.net/77892-10814/tapp/763210?postId=11454
	vulnerability@ncsc.ch	https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Webbox"
          ],
          "product": "TeamDavid",
          "vendor": "Tobit Laboratories AG",
          "versions": [
            {
              "lessThan": "Rollout 528",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "vulnerability@ncsc.ch"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tobit Laboratories AG TeamDavid\u0027s Webbox application exposes a functionality that allows the server to be \nshut down when a specific endpoint (/internalRestart) is accessed. This \nendpoint is accessible to unauthenticated users over the public \nInternet. Instead of \u201crestarting\u201d, the server shuts completely down. As a\n result, a remote attacker can trigger a persistent denial of service by\n shutting down the web server without requiring authentication. Recovery\n requires manual administrator intervention to restart the service.\u00a0This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality."
    }
  ],
  "id": "CVE-2026-54213",
  "lastModified": "2026-09-07T13:20:30.487",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.2,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "vulnerability@ncsc.ch",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54213",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-07T13:16:49.553112Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-07T10:16:58.500",
  "references": [
    {
      "source": "vulnerability@ncsc.ch",
      "url": "https://chayns.net/77892-10814/tapp/763210?postId=11454"
    },
    {
      "source": "vulnerability@ncsc.ch",
      "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/"
    }
  ],
  "sourceIdentifier": "vulnerability@ncsc.ch",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "vulnerability@ncsc.ch",
      "type": "Secondary"
    }
  ]
}

CVE-2026-54213 (GCVE-0-2026-54213)

Vulnerability from cvelistv5 – Published: 2026-08-07 09:47 – Updated: 2026-09-07 12:59

Title

TeamDavid: Denial of Service via endpoint 'internalRestart'

Summary

Severity

9.2 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-07 13:16 UTC

CWE

CWE-284 - Improper Access Control

Assigner

NCSC.ch mitre root

References

2 references

URL	Tags
https://chayns.net/77892-10814/tapp/763210?postId=11454	release-notes
https://labs.infoguard.ch/posts/22-cves-in-david-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Tobit Laboratories AG	TeamDavid	Affected: 0 , < Rollout 528 (custom)

Credits

Dario Weiss of InfoGuard Labs

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54213",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-07T13:16:49.553112Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-07T13:17:54.047Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Webbox"
          ],
          "product": "TeamDavid",
          "vendor": "Tobit Laboratories AG",
          "versions": [
            {
              "lessThan": "Rollout 528",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Dario Weiss of InfoGuard Labs"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "type": "text/html",
              "value": "Tobit Laboratories AG TeamDavid\u0027s Webbox application exposes a functionality that allows the server to be \nshut down when a specific endpoint (/internalRestart) is accessed. This \nendpoint is accessible to unauthenticated users over the public \nInternet. Instead of \u201crestarting\u201d, the server shuts completely down. As a\n result, a remote attacker can trigger a persistent denial of service by\n shutting down the web server without requiring authentication. Recovery\n requires manual administrator intervention to restart the service.\u0026nbsp;\u003cdiv\u003e\u003cdiv\u003e\u003cspan\u003eThis issue affects TeamDavid before Rollout 528.\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan\u003eStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e"
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 9.2,
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            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-284",
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      "providerMetadata": {
        "dateUpdated": "2026-09-07T12:59:55.983Z",
        "orgId": "455daabc-a392-441d-aa46-37d35189897c",
        "shortName": "NCSC.ch"
      },
      "references": [
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          "tags": [
            "release-notes"
          ],
          "url": "https://chayns.net/77892-10814/tapp/763210?postId=11454"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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    "dateReserved": "2026-06-12T09:32:46.514Z",
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    "state": "PUBLISHED"
  },
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  "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.