{"id":"CVE-2020-27656","aliases":["EUVD-2020-20163","GHSA-8mf3-6333-x5rm"],"status":"published","title":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation...","description":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00547,"percentile":0.46153,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-319"],"published":"2020-10-29T09:00:26Z","modified":"2026-06-17T03:09:26Z","products":[{"vendor":"synology","product":"diskstation manager (dsm)"},{"vendor":"synology","product":"diskstation_manager"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_20_18","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1071","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27656"},{"url":"https://github.com/advisories/GHSA-8mf3-6333-x5rm"}],"sources":{"cve":[{"id":"CVE-2020-27656","description":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.","status":"published","published":"2020-10-29T09:00:26.44Z","modified":"2024-09-16T17:28:58.26Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-20163","description":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.","status":"published","published":"2020-10-29T09:00:26Z","modified":"2024-09-16T17:28:58Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:55:41.41816Z"}],"ghsa":[{"id":"GHSA-8mf3-6333-x5rm","title":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation...","description":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.","status":"published","published":"2022-05-24T17:32:36Z","modified":"2025-01-14T21:32:48Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:59:31.794566Z"}],"nvd":[{"id":"CVE-2020-27656","description":"Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.","status":"published","published":"2020-10-29T09:15:13.497Z","modified":"2026-06-17T03:09:26.863Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:06:21.80969Z"}]}}