{
  "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-2026-11405",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-11405",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-06T19:17:07.891Z",
    "updatedAt": "2026-07-08T13:40:24.471Z",
    "importedAt": "2026-10-24T01:57:50.502Z",
    "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": "Hidden backdoor authentication mechanism in multiple versions of Tenda firmware allows admin access to web management interface",
      "summary": "The web server binary /bin/httpd contains a hidden backdoor authentication mechanism in the login() function at 004c88b8.\r\n\r\n- The function contains a normal authentication path using MD5/hash-based password verification (prod_encode64/PasswordToMd5/check_rand_key).\r\n- After normal authentication fails, it calls GetValue(\"sys.rzadmin.password\") to read a backdoor password from the device configuration.\r\n- It performs a direct strcmp() comparison (plaintext, not hashed) between the config value and the user-supplied password.\r\n\r\nA successful match grants role=2 (admin-level access) and creates a valid session. The rzadmin username is never checked — any username works with the backdoor",
      "affected": [
        {
          "vendor": "Tenda",
          "product": "firmware",
          "versions": [
            {
              "version": "US_AC6V2.0RTL_V15.03.06.51_multi_T",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Tenda",
          "product": "firmware",
          "versions": [
            {
              "version": "US_AC5V1.0RTL_V15.03.06.48_multi_TDE01",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Tenda",
          "product": "firmware",
          "versions": [
            {
              "version": "US_AC10V1.0re_V15.03.06.46_multi_TDE01",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Tenda",
          "product": "firmware",
          "versions": [
            {
              "version": "US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Tenda",
          "product": "firmware",
          "versions": [
            {
              "version": "US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}