{"cve":"CVE-2021-3972","nvd":{"published":"2022-04-22T21:15:09.883","modified":"2026-06-17T04:06:19.020","status":"Modified","description":"A potential vulnerability by a driver used during manufacturing process on some consumer Lenovo Notebook devices' BIOS that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.7},"cwes":["CWE-489"],"references":["https://support.lenovo.com/us/en/product_security/LEN-73440","https://support.lenovo.com/us/en/product_security/LEN-73440"],"products":["lenovo:ideapad_3-14ada05_firmware","lenovo:ideapad_3-14ada6_firmware","lenovo:ideapad_3-14alc6_firmware","lenovo:ideapad_3-14are05_firmware","lenovo:ideapad_3-14igl05_firmware","lenovo:ideapad_3-14iil05_firmware","lenovo:ideapad_3-14iml05_firmware","lenovo:ideapad_3-14itl05_firmware","lenovo:ideapad_3-14itl6_firmware","lenovo:ideapad_3-15ada05_firmware","lenovo:ideapad_3-15ada6_firmware","lenovo:ideapad_3-15alc6_firmware","lenovo:ideapad_3-15are05_firmware","lenovo:ideapad_3-15igl05_firmware","lenovo:ideapad_3-15iil05_firmware","lenovo:ideapad_3-15iml05_firmware","lenovo:ideapad_3-15itl05_firmware","lenovo:ideapad_3-15itl6_firmware","lenovo:ideapad_3-17ada05_firmware","lenovo:ideapad_3-17ada6_firmware","lenovo:ideapad_3-17alc6_firmware","lenovo:ideapad_3-17are05_firmware","lenovo:ideapad_3-17iil05_firmware","lenovo:ideapad_3-17iml05_firmware","lenovo:ideapad_3-17itl6_firmware","lenovo:ideapad_5-15are05_firmware","lenovo:ideapad_5-15iil05_firmware","lenovo:ideapad_creator_5-15imh05_firmware","lenovo:ideapad_gaming_3-15arh05_firmware","lenovo:ideapad_gaming_3-15imh05_firmware","lenovo:l3-15itl6_firmware","lenovo:l340-15irh_firmware","lenovo:l340-15iwl_firmware","lenovo:l340-15iwl_touch_firmware","lenovo:l340-17irh_firmware","lenovo:l340-17iwl_firmware","lenovo:l3_15iml05_firmware","lenovo:legion_5-15ach6_firmware","lenovo:legion_5-15ach6a_firmware","lenovo:legion_5-15ach6h_firmware","lenovo:legion_5-15imh6_firmware","lenovo:legion_5-15ith6_firmware","lenovo:legion_5-15ith6h_firmware","lenovo:legion_5-17ach6_firmware","lenovo:legion_5-17ach6h_firmware","lenovo:legion_5-17ith6_firmware","lenovo:legion_5-17ith6h_firmware","lenovo:legion_5_pro-16ach6_firmware","lenovo:legion_5_pro-16ach6h_firmware","lenovo:legion_5_pro-16ith6_firmware"],"source":"nvd","synced_at":"2026-10-19T21:30:03.577988018+00:00"},"epss":{"cve":"CVE-2021-3972","score":0.02858,"percentile":0.86747,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}