{"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": "2026-03-06T10:36:09.154Z"}, "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"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-06T10:34:45.858741Z", "id": "CVE-2025-13476", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-06T10:36:09.154Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"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"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-13476", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-06T10:34:45.858741Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-06T10:36:03.645Z"}}], "cna": {"title": "Rakuten Viber uses broken or risky cryptographic Algorithm", "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"}]}], "references": [{"url": "https://www.viber.com/en/download/"}], "x_generator": {"env": "prod", "engine": "VINCE 3.0.32", "origin": "https://cveawg.mitre.org/api/cve/CVE-2025-13476"}, "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)"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm"}]}, {"descriptions": [{"lang": "en", "description": "CWE-693"}]}], "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-03-05T16:53:32.465Z"}}}, "cveMetadata": {"cveId": "CVE-2025-13476", "state": "PUBLISHED", "dateUpdated": "2026-03-06T10:36:09.154Z", "dateReserved": "2025-11-20T12:38:19.605Z", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "datePublished": "2026-03-05T16:53:32.465Z", "assignerShortName": "certcc"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:rakuten:viber:*:*:*:*:*:windows:*:*", "matchCriteriaId": "F75AF4DA-3BBA-44F1-80FA-6FF49AB18C20", "versionEndIncluding": "25.8.1.0", "versionStartIncluding": "25.6.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:rakuten:viber:9.3.0.6:25.7.2.0g:*:*:*:android:*:*", "matchCriteriaId": "758AEEB0-8E18-48D2-A8A5-662BAAE54CFF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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)"}, {"lang": "es", "value": "El modo Cloak de Rakuten Viber en Android v25.7.2.0g y Windows v25.6.0.0\u2013v25.8.1.0 utiliza una huella digital TLS ClientHello est\u00e1tica y predecible que carece de diversidad de extensiones, lo que permite a los sistemas de Inspecci\u00f3n Profunda de Paquetes (DPI) identificar y bloquear trivialmente el tr\u00e1fico de proxy, socavando la elusi\u00f3n de la censura. (CWE-327)"}], "id": "CVE-2025-13476", "lastModified": "2026-03-10T19:49:55.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-05T19:15:58.283", "references": [{"source": "[email protected]", "tags": ["Product"], "url": "https://www.viber.com/en/download/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.kb.cert.org/vuls/id/772695"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-327"}], "source": "[email protected]", "type": "Primary"}]}

{}