{"id":"CVE-2021-3849","aliases":["EUVD-2021-27091","GHSA-vxqg-r9mf-h85v"],"status":"published","title":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan...","description":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.","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":"2026-11-10","score":0.01303,"percentile":0.7073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-288"],"published":"2022-04-22T21:10:11Z","modified":"2026-06-17T04:05:53Z","products":[{"vendor":"ibm","product":"nextscale_fan_power_controller_firmware"},{"vendor":"lenovo","product":"fan power controller2 (fpc2)"},{"vendor":"lenovo","product":"lenovo system management module (smm)"},{"vendor":"lenovo","product":"nextscale_n1200_enclosure_firmware"},{"vendor":"lenovo","product":"thinkagile_hx_enclosure_certified_node_firmware"},{"vendor":"lenovo","product":"thinkagile_vx_enclosure_firmware"},{"vendor":"lenovo","product":"thinksystem_d2_enclosure_firmware"}],"references":[{"url":"https://support.lenovo.com/us/en/product_security/LEN-72615","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3849"},{"url":"https://github.com/advisories/GHSA-vxqg-r9mf-h85v"}],"sources":{"cve":[{"id":"CVE-2021-3849","description":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.","status":"published","published":"2022-04-22T21:10:11Z","modified":"2024-08-03T17:09:09.602Z","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-288"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-27091","description":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.","status":"published","published":"2022-04-22T21:10:11Z","modified":"2024-08-03T17:09:09Z","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":"2026-11-03T03:25:11.376657Z"}],"ghsa":[{"id":"GHSA-vxqg-r9mf-h85v","title":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan...","description":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2.  SMM2 is not affected.","status":"published","published":"2022-04-23T00:03:01Z","modified":"2023-01-30T05:00:27Z","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-287"],"updated_at":"2026-11-02T14:46:12.604648Z"}],"nvd":[{"id":"CVE-2021-3849","description":"An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.","status":"published","published":"2022-04-22T21:15:09.557Z","modified":"2026-06-17T04:05:53.43Z","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-288"],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}