{"cve":"CVE-2021-3897","nvd":{"published":"2022-04-22T21:15:09.620","modified":"2026-06-17T04:05:56.883","status":"Modified","description":"An authentication bypass vulnerability was discovered in an internal service of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware during an that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-288"],"references":["https://support.lenovo.com/us/en/product_security/LEN-72615","https://support.lenovo.com/us/en/product_security/LEN-72615"],"products":["ibm:nextscale_fan_power_controller_firmware","lenovo:nextscale_n1200_enclosure_firmware","lenovo:thinkagile_hx_enclosure_certified_node_firmware","lenovo:thinkagile_vx_enclosure_firmware","lenovo:thinksystem_d2_enclosure_firmware"],"source":"nvd","synced_at":"2026-10-19T21:30:03.577988018+00:00"},"epss":{"cve":"CVE-2021-3897","score":0.01296,"percentile":0.70356,"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."]}