{"id":"CVE-2021-34426","aliases":["EUVD-2021-21084","GHSA-h72j-pmww-phww"],"status":"published","title":"Arbitrary command execution in Keybase Client for Windows","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00247,"percentile":0.16089,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-12-14T19:26:03Z","modified":"2026-10-24T10:30:43Z","products":[{"vendor":"keybase","product":"keybase"},{"vendor":"zoom video communications inc","product":"keybase client for windows"}],"references":[{"url":"https://explore.zoom.us/en/trust/security/security-bulletin","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34426"},{"url":"https://github.com/advisories/GHSA-h72j-pmww-phww"}],"sources":{"cve":[{"id":"CVE-2021-34426","title":"Arbitrary command execution in Keybase Client for Windows","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system.","status":"published","published":"2021-12-14T19:26:03.894Z","modified":"2024-09-17T04:09:55.829Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21084","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system.","status":"published","published":"2021-12-14T19:26:03Z","modified":"2024-09-17T04:09:55Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:28:25.314109Z"}],"ghsa":[{"id":"GHSA-h72j-pmww-phww","title":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user...","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user’s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user’s local system.","status":"published","published":"2021-12-15T00:00:41Z","modified":"2023-02-01T05:07:03Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:50:28.399252Z"}],"nvd":[{"id":"CVE-2021-34426","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system.","status":"published","published":"2021-12-14T20:15:07.437Z","modified":"2026-06-17T03:55:50.403Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}],"osv":[{"id":"CVE-2021-34426","description":"A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system.","status":"published","published":"2021-12-14T20:15:07.437Z","modified":"2026-10-24T10:30:43.418002361Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:20.13324Z"}]}}