{"id":"CVE-2021-27648","aliases":["EUVD-2021-14394","GHSA-55vq-f28f-xgcc"],"status":"published","title":"Externally controlled reference to a resource in another sphere in quarantine functionality in...","description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.02843,"percentile":0.86856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-610"],"published":"2021-04-28T07:25:14Z","modified":"2026-06-17T03:45:17Z","products":[{"vendor":"synology","product":"antivirus_essential"},{"vendor":"synology","product":"synology antivirus essential"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_21_15","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27648"},{"url":"https://github.com/advisories/GHSA-55vq-f28f-xgcc"}],"sources":{"cve":[{"id":"CVE-2021-27648","description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","status":"published","published":"2021-04-28T07:25:14.326Z","modified":"2024-09-16T16:58:04.591Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-610"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14394","description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","status":"published","published":"2021-04-28T07:25:14Z","modified":"2024-09-16T16:58:04Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:55:46.745399Z"}],"ghsa":[{"id":"GHSA-55vq-f28f-xgcc","title":"Externally controlled reference to a resource in another sphere in quarantine functionality in...","description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","status":"published","published":"2022-05-24T17:49:00Z","modified":"2023-01-29T05:06:06Z","cwes":["CWE-610"],"updated_at":"2026-11-02T14:45:56.584389Z"}],"nvd":[{"id":"CVE-2021-27648","description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","status":"published","published":"2021-04-28T08:15:07.69Z","modified":"2026-06-17T03:45:17.757Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-610"],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}