{
  "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-2025-13476",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-13476",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-05T16:53:32.465Z",
    "updatedAt": "2026-03-06T10:36:09.154Z",
    "importedAt": "2026-10-24T01:57:24.991Z",
    "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": "Rakuten Viber uses broken or risky cryptographic Algorithm",
      "summary": "Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS ClientHello fingerprint lacking extension diversity, allowing Deep Packet Inspection (DPI) systems to trivially identify and block proxy traffic, undermining censorship circumvention. (CWE-327)",
      "affected": [
        {
          "vendor": "Rakuten Viber",
          "product": "Rakuten Viber Cloak - Android",
          "versions": [
            {
              "version": "25.7.2.0g",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "27.2.0.0g"
            }
          ]
        },
        {
          "vendor": "Rakuten Viber",
          "product": "Rakuten Viber Cloak - Windows",
          "versions": [
            {
              "version": "v25.6.0.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v27.3.0.0"
            }
          ]
        }
      ]
    }
  }
}