ssa-486936
Vulnerability from csaf_siemens
Published
2025-10-14 00:00
Modified
2025-10-14 00:00
Summary
SSA-486936: Authentication Vulnerability in SIMATIC ET 200SP Communication Processors

Notes

Summary
SIMATIC ET 200SP communication processors (CP 1542SP-1, CP 1542SP-1 IRC and CP 1543SP-1, incl. SIPLUS variants) contain an authentication vulnerability that could allow an unauthenticated remote attacker to access the configuration data. Siemens has released new versions for the affected products and recommends to update to the latest versions.
General Recommendations
As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.


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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "SIMATIC ET 200SP communication processors (CP 1542SP-1, CP 1542SP-1 IRC and CP 1543SP-1, incl. SIPLUS variants) contain an authentication vulnerability that could allow an unauthenticated remote attacker to access the configuration data.\n\nSiemens has released new versions for the affected products and recommends to update to the latest versions.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-486936: Authentication Vulnerability in SIMATIC ET 200SP Communication Processors - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-486936.html"
      },
      {
        "category": "self",
        "summary": "SSA-486936: Authentication Vulnerability in SIMATIC ET 200SP Communication Processors - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-486936.json"
      }
    ],
    "title": "SSA-486936: Authentication Vulnerability in SIMATIC ET 200SP Communication Processors",
    "tracking": {
      "current_release_date": "2025-10-14T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-486936",
      "initial_release_date": "2025-10-14T00:00:00Z",
      "revision_history": [
        {
          "date": "2025-10-14T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "interim",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0)",
                  "product_id": "1",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7542-6UX00-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0)",
                  "product_id": "2",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7542-6VX00-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0)",
                  "product_id": "3",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7543-6WX00-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0)",
                  "product_id": "4",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG2542-6VX00-4XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0)",
                  "product_id": "5",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG1543-6WX00-7XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.4.24",
                "product": {
                  "name": "SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0)",
                  "product_id": "6",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG2543-6WX00-4XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-40771",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected devices do not properly authenticate configuration connections. This could allow an unauthenticated remote attacker to access the configuration data.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Restrict access to the affected systems to trusted IP addresses only",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.4.24 or later version",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109995159/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ]
        }
      ],
      "title": "CVE-2025-40771"
    }
  ]
}


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