VDE-2026-068

Vulnerability from csaf_mbconnectlinegmbh - Published: 2026-06-23 11:00 - Updated: 2026-06-23 11:00
Summary
MB connect line: Authenticated unintended access to critical program parameters in mbCONNECT24/mymbCONNECT24
Severity
High
Notes
Summary: There is a vulnerability in mbCONNECT24/mymbCONNECT24 that allows an authenticated remote attacker to access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters.
Impact: CVE-2026-10521 allows an authenticated remote attacker to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.
Remediation: Update the mbCONNECT24/mymbCONNECT24 instance to version 2.20.2.
CVE-2026-10521

An high privileged remote attacker can access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.

7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-425 - Direct Request ('Forced Browsing')
Vendor Fix Update the mbCONNECT24/mymbCONNECT24 instance to version 2.20.2.
Affected products
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31005 —
Unresolved product id: CSAFPID-31006 —
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31001 —
Unresolved product id: CSAFPID-31002 —
Unresolved product id: CSAFPID-31003 —
Unresolved product id: CSAFPID-31004 —
References
Acknowledgments
CERT@VDE certvde.com
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.first.org/cvss/v3.1/specification-document#Qualitative-Severity-Rating-Scale",
      "text": "High"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "There is a vulnerability in mbCONNECT24/mymbCONNECT24 that allows an authenticated remote attacker to access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "CVE-2026-10521 allows an authenticated remote attacker to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "Update the mbCONNECT24/mymbCONNECT24 instance to version 2.20.2.\n",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "security-team@mbconnectline.de",
      "name": "MB connect line GmbH",
      "namespace": "https://mbconnectline.com"
    },
    "references": [
      {
        "category": "external",
        "summary": "Product security incident reports",
        "url": "https://mbconnectline.com/security-advice"
      },
      {
        "category": "self",
        "summary": "Security Incident Management SIM#2026-04 - PDF",
        "url": "https://advisories.mbconnectline.com/pdf/SIM2026-04.pdf"
      },
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for MB connect line",
        "url": "https://certvde.com/en/advisories/vendor/mbconnectline"
      },
      {
        "category": "self",
        "summary": "VDE-2026-068: MB connect line: Authenticated unintended access to critical program parameters in mbCONNECT24/mymbCONNECT24 - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2026-068"
      },
      {
        "category": "self",
        "summary": "VDE-2026-068: MB connect line: Authenticated unintended access to critical program parameters in mbCONNECT24/mymbCONNECT24 - CSAF",
        "url": "https://mbconnectline.csaf-tp.certvde.com/.well-known/csaf/white/2026/vde-2026-068.json"
      }
    ],
    "title": "MB connect line: Authenticated unintended access to critical program parameters in mbCONNECT24/mymbCONNECT24",
    "tracking": {
      "aliases": [
        "VDE-2026-068",
        "SIM#2026-04"
      ],
      "current_release_date": "2026-06-23T11:00:00.000Z",
      "generator": {
        "date": "2026-06-18T09:38:03.021Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.5.44"
        }
      },
      "id": "VDE-2026-068",
      "initial_release_date": "2026-06-23T11:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-23T11:00:00.000Z",
          "number": "1.0.0",
          "summary": "Initial revision."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_family",
                "name": "mbCONNECT24",
                "product": {
                  "name": "MB connect line mbCONNECT24",
                  "product_id": "CSAFPID-11001",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:h:mb_connect_line:mbCONNECT24:*:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "mymbCONNECT24",
                "product": {
                  "name": "MB connect line mymbCONNECT24",
                  "product_id": "CSAFPID-11002",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:h:mb_connect_line:mymbCONNECT24:*:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Hardware"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:semver/\u003c2.20.2",
                "product": {
                  "name": "Firmware \u003c2.20.2",
                  "product_id": "CSAFPID-21001"
                }
              },
              {
                "category": "product_version",
                "name": "2.20.2",
                "product": {
                  "name": "Firmware 2.20.2",
                  "product_id": "CSAFPID-21002",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:mb_connect_line:mbconnect24_firmware:2.20.2:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "2.20.1",
                "product": {
                  "name": "Firmware 2.20.1",
                  "product_id": "CSAFPID-21003",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:mb_connect_line:mbconnect24_firmware:2.20.1:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Firmware"
          }
        ],
        "category": "vendor",
        "name": "MB connect line"
      }
    ],
    "product_groups": [
      {
        "group_id": "CSAFGID-0001",
        "product_ids": [
          "CSAFPID-31001",
          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004"
        ],
        "summary": "Affected products."
      },
      {
        "group_id": "CSAFGID-0002",
        "product_ids": [
          "CSAFPID-31005",
          "CSAFPID-31006"
        ],
        "summary": "Fixed products."
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c2.20.2 installed on MB connect line mbCONNECT24",
          "product_id": "CSAFPID-31001"
        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c2.20.2 installed on MB connect line mymbCONNECT24",
          "product_id": "CSAFPID-31002"
        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 2.20.1 installed on MB connect line mbCONNECT24",
          "product_id": "CSAFPID-31003",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:mb_connect_line:mbconnect24:2.20.1:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21003",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 2.20.1 installed on MB connect line mymbCONNECT24",
          "product_id": "CSAFPID-31004",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:mb_connect_line:mymbconnect24:2.20.1:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21003",
        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 2.20.2 installed on MB connect line mbCONNECT24",
          "product_id": "CSAFPID-31005",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:mb_connect_line:mbconnect24:2.20.2:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21002",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 2.20.2 installed on MB connect line mymbCONNECT24",
          "product_id": "CSAFPID-31006",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:mb_connect_line:mymbconnect24:2.20.2:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21002",
        "relates_to_product_reference": "CSAFPID-11002"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-10521",
      "cwe": {
        "id": "CWE-425",
        "name": "Direct Request (\u0027Forced Browsing\u0027)"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "An high privileged remote attacker can access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-31005",
          "CSAFPID-31006"
        ],
        "known_affected": [
          "CSAFPID-31001",
          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - 8.6 / High",
          "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update the mbCONNECT24/mymbCONNECT24 instance to version 2.20.2.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 7.2,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "temporalScore": 7.2,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001",
            "CSAFPID-31002",
            "CSAFPID-31003",
            "CSAFPID-31004"
          ]
        }
      ],
      "title": "Authenticated unintended access to critical program parameters"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.