{
    "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–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)"
                }
            ],
            "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"
                }
            }
        ]
    }
}