{
  "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": "The products listed below contain a denial of service vulnerability that could allow an attacker to force the devices into protection mode under certain conditions. This disables remote connectivity functions (Web Access) to the devices.\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 affected products with appropriate mechanisms. It is advised to follow recommended security practices in order to run the devices in a protected IT environment.",
        "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-823812: Denial of Service Vulnerability in WTV676 and WTV776 devices - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-823812.html"
      },
      {
        "category": "self",
        "summary": "SSA-823812: Denial of Service Vulnerability in WTV676 and WTV776 devices - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-823812.json"
      }
    ],
    "title": "SSA-823812: Denial of Service Vulnerability in WTV676 and WTV776 devices",
    "tracking": {
      "current_release_date": "2026-09-16T00:00:00.000Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-823812",
      "initial_release_date": "2026-09-16T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-09-16T00:00:00.000Z",
          "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/<3.94",
                "product": {
                  "name": "WTV676-HB6035 Web Interface < V3.94",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "WTV676-HB6035 Web Interface"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/<4.17",
                "product": {
                  "name": "WTV776-HB6035 Web Interface < V4.17",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "WTV776-HB6035 Web Interface"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-89207",
      "cwe": {
        "id": "CWE-1287",
        "name": "Improper Validation of Specified Type of Input"
      },
      "notes": [
        {
          "category": "description",
          "text": "Affected devices do not properly validate input received from backend services.\r\nThis could allow an unauthenticated remote attacker to force the device into protection mode, which results in losing remote connectivity functions (Web Access).",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V3.94 or later version",
          "product_ids": [
            "1"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109480838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.17 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109480838/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "1",
            "2"
          ]
        }
      ],
      "title": "CVE-2026-89207"
    }
  ]
}