{"id":"CVE-2021-45841","aliases":["EUVD-2021-32559","GHSA-gmc4-3pqc-993q"],"status":"published","title":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session...","description":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.08416,"percentile":0.95029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-287","CWE-798"],"published":"2022-04-25T00:00:00Z","modified":"2026-06-17T04:14:08Z","exploits":[{"source":"metasploit","id":"exploit/linux/http/terramaster_unauth_rce_cve_2021_45837","title":"TerraMaster TOS 4.2.15 or lower - RCE chain from unauthenticated to root via session crafting.","type":"exploit","platform":"Linux,Unix","date":"2021-12-24","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/linux/http/terramaster_unauth_rce_cve_2021_45837"}],"products":[{"vendor":"terra-master","product":"tos"}],"references":[{"url":"https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/172881/TerraMaster-TOS-4.2.15-Remote-Code-Execution.html","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45841"},{"url":"https://github.com/advisories/GHSA-gmc4-3pqc-993q"}],"sources":{"cve":[{"id":"CVE-2021-45841","description":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.","status":"published","published":"2022-04-25T00:00:00Z","modified":"2024-08-04T04:54:30.853Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-32559","description":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.","status":"published","published":"2022-04-25T00:00:00Z","modified":"2024-08-04T04:54:30Z","updated_at":"2026-11-03T03:08:25.77408Z"}],"ghsa":[{"id":"GHSA-gmc4-3pqc-993q","title":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session...","description":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.","status":"published","published":"2022-04-26T00:00:43Z","modified":"2023-06-21T05:00:56Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:54:38.89081Z"}],"nvd":[{"id":"CVE-2021-45841","description":"In Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517), an attacker can self-sign session cookies by knowing the target's MAC address and the user's password hash. Guest users (disabled by default) can be abused using a null/empty hash and allow an unauthenticated attacker to login as guest.","status":"published","published":"2022-04-25T11:15:07.237Z","modified":"2026-06-17T04:14:08.787Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287","CWE-798"],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}