{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-3611",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-3611",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-12T20:06:05.753Z",
    "updatedAt": "2026-03-30T15:26:08.604Z",
    "importedAt": "2026-10-24T01:58:08.712Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Honeywell IQ4x BMS Controller Missing authentication for critical function",
      "summary": "The Honeywell IQ4x building management controller, exposes its full web-based HMI without authentication in its factory-default configuration. With no user module configured, security is disabled by design and the system operates under a System Guest (level 100) context, granting read/write privileges to any party able to reach the HTTP interface. Authentication controls are only enforced after a web user is created via U.htm, which dynamically enables the user module. Because this function is accessible prior to authentication, a remote user can create a new account with administrative read/write permissions enabling the user module and imposing authentication under attacker-controlled credentials. This action can effectively lock legitimate operators out of local and web-based configuration and administration.",
      "affected": [
        {
          "vendor": "Honeywell",
          "product": "IQ4E",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQ412",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQ422",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQ4NC",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQ41x",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQ3",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "IQECO",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v3.50_3.44",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.36 (build 4.3.7.9)"
            }
          ]
        }
      ]
    }
  }
}