VDE-2026-059

Vulnerability from csaf_helmholzgmbhcokg - Published: 2026-05-27 11:00 - Updated: 2026-05-27 11:00
Summary
Helmholz: Multiple vulnerabilities in REX100/REX200/REX250
Severity
High
Notes
Summary: Two command injection vulnerabilities have been discovered in Helmholz REX100/REX200/REX250.
Impact: The vulnerabilities allow for command injection in REX100/REX200/REX250 with varying prerequisites resulting in full system compromise.
Remediation: Update: - REX200/REX250: 8.4.5 - REX100: 3.0.3
CVE-2026-40851

A low privileged local attacker can perform a confusion attack on the cfgparser via a specially crafted file on an USB stick leading to code execution. This can result in a total loss of confidentiality, integrity and availability.

8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-1287 - Improper Validation of Specified Type of Input
Vendor Fix Update: - REX200/250: 8.4.5 - REX100: 3.0.3
Affected products
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31011 —
Unresolved product id: CSAFPID-31012 —
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31007 —
Unresolved product id: CSAFPID-31008 —
Unresolved product id: CSAFPID-31009 —
Unresolved product id: CSAFPID-31010 —
CVE-2026-40852

A high privileged attacker can alter the config generator injecting a payload into future created configurations. The device is not correctly checking this configuration value before passing it to an system execute leading to code execution. 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-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Vendor Fix Update: - REX200/250: 8.4.5 - REX100: 3.0.3
Affected products
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31011 —
Unresolved product id: CSAFPID-31012 —
Product Identifier Version Remediation
Unresolved product id: CSAFPID-31007 —
Unresolved product id: CSAFPID-31008 —
Unresolved product id: CSAFPID-31009 —
Unresolved product id: CSAFPID-31010 —
References
Acknowledgments
CERT@VDE certvde.com
SySS GmbH Moritz Abrell Christian Zäske www.syss.de
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "names": [
          "Moritz Abrell",
          "Christian Z\u00e4ske"
        ],
        "organization": "SySS GmbH",
        "summary": "reporting",
        "urls": [
          "https://www.syss.de"
        ]
      }
    ],
    "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": "Two command injection vulnerabilities have been discovered in Helmholz REX100/REX200/REX250.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "The vulnerabilities allow for command injection in REX100/REX200/REX250 with varying prerequisites resulting in full system compromise.\n\n",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "Update:\n\n- REX200/REX250: 8.4.5\n- REX100: 3.0.3",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@helmholz.de",
      "name": "Helmholz GmbH \u0026 Co. KG",
      "namespace": "https://www.helmholz.de"
    },
    "references": [
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for Helmholz",
        "url": "https://certvde.com/en/advisories/vendor/helmholz"
      },
      {
        "category": "self",
        "summary": "VDE-2026-059: Helmholz: Multiple vulnerabilities in REX100/REX200/REX250 - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2026-059"
      },
      {
        "category": "self",
        "summary": "VDE-2026-059: Helmholz: Multiple vulnerabilities in REX100/REX200/REX250 - CSAF",
        "url": "https://helmholz.csaf-tp.certvde.com/.well-known/csaf/white/2026/vde-2026-059.json"
      }
    ],
    "title": "Helmholz: Multiple vulnerabilities in REX100/REX200/REX250",
    "tracking": {
      "aliases": [
        "VDE-2026-059",
        "SIM#2026-01-2"
      ],
      "current_release_date": "2026-05-27T11:00:00.000Z",
      "generator": {
        "date": "2026-05-27T13:03:54.275Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.5.44"
        }
      },
      "id": "VDE-2026-059",
      "initial_release_date": "2026-05-27T11:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-27T11:00:00.000Z",
          "number": "1.0.0",
          "summary": "Initial revision."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "REX200/250",
                "product": {
                  "name": "Helmholz REX200/250",
                  "product_id": "CSAFPID-11003",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:h:helmholz:rex200_250:*:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "REX100",
                "product": {
                  "name": "Helmholz REX100",
                  "product_id": "CSAFPID-11004",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:h:helmholz:rex100:*:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Hardware"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:semver/\u003c=8.4.4",
                "product": {
                  "name": "Firmware \u003c=8.4.4",
                  "product_id": "CSAFPID-21004"
                }
              },
              {
                "category": "product_version",
                "name": "8.4.5",
                "product": {
                  "name": "Firmware 8.4.5",
                  "product_id": "CSAFPID-21005",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:helmholz:rex200_firmware:8.4.5:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "8.4.4",
                "product": {
                  "name": "Firmware 8.4.4",
                  "product_id": "CSAFPID-21006",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:helmholz:rex200_firmware:8.4.4:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:semver/\u003c=3.0.2",
                "product": {
                  "name": "Firmware \u003c=3.0.2",
                  "product_id": "CSAFPID-21007"
                }
              },
              {
                "category": "product_version",
                "name": "3.0.3",
                "product": {
                  "name": "Firmware 3.0.3",
                  "product_id": "CSAFPID-21008",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:helmholz:rex100_firmware:3.0.3:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "3.0.2",
                "product": {
                  "name": "Firmware 3.0.2",
                  "product_id": "CSAFPID-21009",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:helmholz:rex100_firmware:3.0.2:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Firmware"
          }
        ],
        "category": "vendor",
        "name": "Helmholz"
      }
    ],
    "product_groups": [
      {
        "group_id": "CSAFGID-0001",
        "product_ids": [
          "CSAFPID-31007",
          "CSAFPID-31008",
          "CSAFPID-31009",
          "CSAFPID-31010"
        ],
        "summary": "Affected products."
      },
      {
        "group_id": "CSAFGID-0002",
        "product_ids": [
          "CSAFPID-31011",
          "CSAFPID-31012"
        ],
        "summary": "Fixed products."
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c=8.4.4 installed on Helmholz REX200/250",
          "product_id": "CSAFPID-31007"
        },
        "product_reference": "CSAFPID-21004",
        "relates_to_product_reference": "CSAFPID-11003"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c=3.0.2 installed on Helmholz REX100",
          "product_id": "CSAFPID-31008"
        },
        "product_reference": "CSAFPID-21007",
        "relates_to_product_reference": "CSAFPID-11004"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 8.4.4 installed on Helmholz REX200/250",
          "product_id": "CSAFPID-31009",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:helmholz:rex200_250:8.4.4:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21006",
        "relates_to_product_reference": "CSAFPID-11003"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 3.0.2 installed on MB connect line mbNET.mini",
          "product_id": "CSAFPID-31010",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:helmholz:rex100:3.0.2:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21009",
        "relates_to_product_reference": "CSAFPID-11004"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 8.4.5 installed on MB connect line mbNET/mbNET.rokey",
          "product_id": "CSAFPID-31011",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:helmholz:rex200_250:8.4.5:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21005",
        "relates_to_product_reference": "CSAFPID-11003"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 3.0.3 installed on MB connect line mbNET.mini",
          "product_id": "CSAFPID-31012",
          "product_identification_helper": {
            "cpe": "cpe:2.3:o:helmholz:rex100:3.0.3:*:*:*:*:*:*:*"
          }
        },
        "product_reference": "CSAFPID-21008",
        "relates_to_product_reference": "CSAFPID-11004"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-40851",
      "cwe": {
        "id": "CWE-1287",
        "name": "Improper Validation of Specified Type of Input"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "A low privileged local attacker can perform a confusion attack on the cfgparser via a specially crafted file on an USB stick leading to code execution. This can result in a total loss of confidentiality, integrity and availability.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-31011",
          "CSAFPID-31012"
        ],
        "known_affected": [
          "CSAFPID-31007",
          "CSAFPID-31008",
          "CSAFPID-31009",
          "CSAFPID-31010"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - 8.5 / High",
          "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update:\n\n- REX200/250: 8.4.5\n- REX100: 3.0.3",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 8.4,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 8.4,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31007",
            "CSAFPID-31008",
            "CSAFPID-31009",
            "CSAFPID-31010"
          ]
        }
      ],
      "title": "Command injection via USB"
    },
    {
      "cve": "CVE-2026-40852",
      "cwe": {
        "id": "CWE-78",
        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "A high privileged attacker can alter the config generator injecting a payload into future created configurations. The device is not correctly checking this configuration value before passing it to an system execute leading to code execution. This can result in a total loss of confidentiality, integrity and availability.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-31011",
          "CSAFPID-31012"
        ],
        "known_affected": [
          "CSAFPID-31007",
          "CSAFPID-31008",
          "CSAFPID-31009",
          "CSAFPID-31010"
        ]
      },
      "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:\n\n- REX200/250: 8.4.5\n- REX100: 3.0.3",
          "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-31007",
            "CSAFPID-31008",
            "CSAFPID-31009",
            "CSAFPID-31010"
          ]
        }
      ],
      "title": "Command injection via malicious configuration"
    }
  ]
}


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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.