{"id":"CVE-2021-36809","aliases":["EUVD-2021-23385","GHSA-c7p5-h3xc-723m"],"status":"published","title":"A local attacker can overwrite arbitrary files on the system with VPN client logs using...","description":"A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0023,"percentile":0.1395,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2022-03-07T23:45:11Z","modified":"2026-06-17T03:59:28Z","products":[{"vendor":"sophos","product":"ssl vpn client"},{"vendor":"sophos","product":"ssl_vpn_client"}],"references":[{"url":"https://www.sophos.com/en-us/security-advisories/sophos-sa-20220303-sslvpn-local-dos","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36809"},{"url":"https://github.com/advisories/GHSA-c7p5-h3xc-723m"}],"sources":{"cve":[{"id":"CVE-2021-36809","description":"A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.","status":"published","published":"2022-03-07T23:45:11Z","modified":"2024-08-04T01:01:59.782Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-23385","description":"A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.","status":"published","published":"2022-03-07T23:45:11Z","modified":"2024-08-04T01:01:59Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-03T03:24:29.329171Z"}],"ghsa":[{"id":"GHSA-c7p5-h3xc-723m","title":"A local attacker can overwrite arbitrary files on the system with VPN client logs using...","description":"A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.","status":"published","published":"2022-03-09T00:00:46Z","modified":"2023-02-03T05:06:33Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:53:55.296222Z"}],"nvd":[{"id":"CVE-2021-36809","description":"A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.","status":"published","published":"2022-03-08T00:15:07.717Z","modified":"2026-06-17T03:59:28.503Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:07:05.198719Z"}]}}