{"id":"CVE-2021-27646","aliases":["EUVD-2021-14392","GHSA-qm39-44mj-vqvq"],"status":"published","title":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM)...","description":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0392,"percentile":0.90416,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2021-03-12T06:45:13Z","modified":"2026-06-17T03:45:17Z","products":[{"vendor":"synology","product":"diskstation_manager"},{"vendor":"synology","product":"synology diskstation manager (dsm)"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_20_26","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-340/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-339/","tags":["x_refsource_MISC","x_transferred","Not Applicable"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27646"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-339"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-340"},{"url":"https://github.com/advisories/GHSA-qm39-44mj-vqvq"}],"sources":{"cve":[{"id":"CVE-2021-27646","description":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.","status":"published","published":"2021-03-12T06:45:13.026Z","modified":"2024-09-16T18:54:23.293Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14392","description":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.","status":"published","published":"2021-03-12T06:45:13Z","modified":"2024-09-16T18:54:23Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:55:28.088118Z"}],"ghsa":[{"id":"GHSA-qm39-44mj-vqvq","title":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM)...","description":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.","status":"published","published":"2022-05-24T17:44:30Z","modified":"2025-01-14T21:32:48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:59:31.794566Z"}],"nvd":[{"id":"CVE-2021-27646","description":"Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.","status":"published","published":"2021-03-12T07:15:13.717Z","modified":"2026-06-17T03:45:17.533Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}