{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-13476", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2025-11-20T12:38:19.605Z", "datePublished": "2026-03-05T16:53:32.465Z", "dateUpdated": "2026-03-05T18:35:24.559Z"}, "containers": {"cna": {"title": "Rakuten Viber uses broken or risky cryptographic Algorithm", "descriptions": [{"lang": "en", "value": "Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0\u2013v25.8.1.0 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)"}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Rakuten Viber", "product": "Rakuten Viber Cloak - Android", "versions": [{"status": "affected", "version": "25.7.2.0g", "lessThan": "27.2.0.0g", "versionType": "custom"}]}, {"vendor": "Rakuten Viber", "product": "Rakuten Viber Cloak - Windows", "versions": [{"status": "affected", "version": "v25.6.0.0", "lessThan": "v27.3.0.0", "versionType": "custom"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm"}]}, {"descriptions": [{"lang": "en", "description": "CWE-693"}]}], "references": [{"url": "https://www.viber.com/en/download/"}], "x_generator": {"engine": "VINCE 3.0.32", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2025-13476"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-03-05T16:53:32.465Z"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://www.kb.cert.org/vuls/id/772695"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-05T18:35:24.559Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0\u2013v25.8.1.0 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)"}], "id": "CVE-2025-13476", "lastModified": "2026-03-05T19:38:33.877", "metrics": {}, "published": "2026-03-05T19:15:58.283", "references": [{"source": "cret@cert.org", "url": "https://www.viber.com/en/download/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/772695"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Awaiting Analysis"}

{}

{}