{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47961", "assignerOrgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "state": "PUBLISHED", "assignerShortName": "synology", "dateReserved": "2026-04-10T06:29:38.695Z", "datePublished": "2026-04-10T09:22:37.522Z", "dateUpdated": "2026-04-10T12:42:56.656Z"}, "containers": {"cna": {"problemTypes": [{"descriptions": [{"lang": "en", "description": "Plaintext Storage of a Password", "cweId": "CWE-256", "type": "CWE"}]}], "affected": [{"vendor": "Synology", "product": "Synology SSL VPN Client", "versions": [{"version": "*", "status": "affected", "lessThan": "1.4.5-0684", "versionType": "semver"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction."}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"baseScore": 8.1, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "version": "3.1"}}], "references": [{"url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_05", "name": "Synology-SA-26:05 Synology SSL VPN Client", "tags": ["vendor-advisory"]}], "credits": [{"lang": "en", "value": "Laurent Sibilla (https://www.linkedin.com/in/lsibilla/)", "type": "finder"}], "providerMetadata": {"orgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "shortName": "synology", "dateUpdated": "2026-04-10T09:22:37.522Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-10T12:42:50.035627Z", "id": "CVE-2021-47961", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-04-10T12:42:56.656Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47961", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-10T12:42:50.035627Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-10T12:42:53.753Z"}}], "cna": {"credits": [{"lang": "en", "type": "finder", "value": "Laurent Sibilla (https://www.linkedin.com/in/lsibilla/)"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Synology", "product": "Synology SSL VPN Client", "versions": [{"status": "affected", "version": "*", "lessThan": "1.4.5-0684", "versionType": "semver"}], "defaultStatus": "affected"}], "references": [{"url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_05", "name": "Synology-SA-26:05 Synology SSL VPN Client", "tags": ["vendor-advisory"]}], "descriptions": [{"lang": "en", "value": "A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-256", "description": "Plaintext Storage of a Password"}]}], "providerMetadata": {"orgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "shortName": "synology", "dateUpdated": "2026-04-10T09:22:37.522Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47961", "state": "PUBLISHED", "dateUpdated": "2026-04-10T12:42:56.656Z", "dateReserved": "2026-04-10T06:29:38.695Z", "assignerOrgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "datePublished": "2026-04-10T09:22:37.522Z", "assignerShortName": "synology"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction."}], "id": "CVE-2021-47961", "lastModified": "2026-04-13T15:02:06.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security@synology.com", "type": "Primary"}]}, "published": "2026-04-10T10:16:03.913", "references": [{"source": "security@synology.com", "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_05"}], "sourceIdentifier": "security@synology.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-256"}], "source": "security@synology.com", "type": "Primary"}]}

{}