Vulnerability · Published Apr 22, 2022 · Assigned by lenovo
CVE-2021-3972
Medium 6.7
In plain English
A medium-severity security flaw in Notebook BIOS from Lenovo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.9% (higher than 87% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)2.9%top 13.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Lenovo | Notebook BIOS | various |
Weakness: CWE-489 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://support.lenovo.com/us/en/product_security/LEN-73440 x_refsource_MISC