An internal shell was included in BIOS image in some ThinkPad models that could allow escalation of privilege.
https://support.lenovo.com/us/en/product_security/LEN-30042
Source: Mitre, NVD
Published: 2020-06-09
Updated: 2026-06-17
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 6.8
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.00047