{"cve":"CVE-2021-3970","nvd":{"published":"2022-04-22T21:15:09.750","modified":"2026-06-17T04:06:18.663","status":"Modified","description":"A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.","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-20"],"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-2021-3970","score":0.01263,"percentile":0.69697,"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."]}