{
  "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-2025-53859",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-53859",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-08-13T14:46:55.471Z",
    "updatedAt": "2025-11-04T21:12:39.856Z",
    "importedAt": "2026-10-24T01:57:39.058Z",
    "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": "NGINX ngx_mail_smtp_module vulnerability",
      "summary": "NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during the NGINX SMTP authentication process and requires the attacker to make preparations against the target system to extract the leaked data. The issue affects NGINX only if (1) it is built with the ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method \"none,\" and (3) the authentication server returns the \"Auth-Wait\" response header.\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
      "affected": [
        {
          "vendor": "F5",
          "product": "NGINX Plus",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "R35",
              "status": "unaffected",
              "versionType": "custom"
            },
            {
              "version": "R34",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "R34 P2"
            },
            {
              "version": "R33",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "R33 P3"
            },
            {
              "version": "R32",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "R32 P3"
            },
            {
              "version": "R31",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*"
            },
            {
              "version": "R30",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*"
            }
          ]
        },
        {
          "vendor": "F5",
          "product": "NGINX Open Source",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "0.7",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "1.29.1"
            }
          ]
        }
      ]
    }
  }
}