CVE-2021-3718

A denial of service vulnerability was reported in some ThinkPad models that could cause a system to crash when the Enhanced Biometrics setting is enabled in BIOS.

Published: 2021-11-12 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3718 is rated Low Risk (21.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.21%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-3718

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.21% +0.17%
2 2025-03-17 0.05% 0.04% -0.01%
3 2023-06-05 — 0.05% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3718

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.7 3.6 [email protected]
4.6 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 3.6 [email protected]
4.7 2.0 MEDIUM
AV:L/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 6.9 [email protected]

Weakness enumeration for CVE-2021-3718

Affected software / configurations for CVE-2021-3718

Vendor Product Version Raw CPE
lenovo thinkpad_11e_3rd_gen_firmware <= 1.22 cpe:2.3:o:lenovo:thinkpad_11e_3rd_gen_firmware:*:*:*:*:braswell:*:*:*
lenovo thinkpad_11e_3rd_gen_firmware <= 1.29 cpe:2.3:o:lenovo:thinkpad_11e_3rd_gen_firmware:*:*:*:*:skylate:*:*:*
lenovo thinkpad_11e_4th_gen_i3_firmware <= 1.22 cpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i3_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_11e_4th_gen_i7_firmware <= 1.22 cpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i7_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_11e_4th_gen_i5_firmware <= 1.22 cpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i5_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_11e_4th_gen_celeron_firmware <= 1.27 cpe:2.3:o:lenovo:thinkpad_11e_4th_gen_celeron_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_11e_yoga_gen_6_firmware <= 1.12 cpe:2.3:o:lenovo:thinkpad_11e_yoga_gen_6_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_13_gen_2_firmware <= 1.29 cpe:2.3:o:lenovo:thinkpad_13_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_e490_firmware <= 1.30 cpe:2.3:o:lenovo:thinkpad_e490_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_e490s_firmware <= 1.30 cpe:2.3:o:lenovo:thinkpad_e490s_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_e590_firmware <= 1.30 cpe:2.3:o:lenovo:thinkpad_e590_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l13_firmware <= 1.31 cpe:2.3:o:lenovo:thinkpad_l13_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l13_gen_2_firmware <= 1.11 cpe:2.3:o:lenovo:thinkpad_l13_gen_2_firmware:*:*:*:*:non-vpro:*:*:*
lenovo thinkpad_l13_gen_2_firmware <= 1.08 cpe:2.3:o:lenovo:thinkpad_l13_gen_2_firmware:*:*:*:*:vpro:*:*:*
lenovo thinkpad_l13_yoga_firmware <= 1.31 cpe:2.3:o:lenovo:thinkpad_l13_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l13_yoga_gen_2_firmware <= 1.11 cpe:2.3:o:lenovo:thinkpad_l13_yoga_gen_2_firmware:*:*:*:*:non-vpro:*:*:*
lenovo thinkpad_l13_yoga_gen_2_firmware <= 1.08 cpe:2.3:o:lenovo:thinkpad_l13_yoga_gen_2_firmware:*:*:*:*:vpro:*:*:*
lenovo thinkpad_l14_gen_1_firmware < 1.15 cpe:2.3:o:lenovo:thinkpad_l14_gen_1_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l14_firmware < 1.20.1.17 cpe:2.3:o:lenovo:thinkpad_l14_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l15_gen_1_firmware < 1.15 cpe:2.3:o:lenovo:thinkpad_l15_gen_1_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l15_firmware < 1.20.1.17 cpe:2.3:o:lenovo:thinkpad_l15_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l380_firmware <= 1.26 cpe:2.3:o:lenovo:thinkpad_l380_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l380_yoga_firmware <= 1.26 cpe:2.3:o:lenovo:thinkpad_l380_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l390_yoga_firmware <= 1.35 cpe:2.3:o:lenovo:thinkpad_l390_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l390_firmware <= 1.35 cpe:2.3:o:lenovo:thinkpad_l390_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l490_firmware < 1.26 cpe:2.3:o:lenovo:thinkpad_l490_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_l590_firmware < 1.26 cpe:2.3:o:lenovo:thinkpad_l590_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_p43s_firmware < n2iet96w cpe:2.3:o:lenovo:thinkpad_p43s_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_p52_firmware < n2cet60w cpe:2.3:o:lenovo:thinkpad_p52_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_p53s_firmware < n2iet96w cpe:2.3:o:lenovo:thinkpad_p53s_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_p72_firmware < n2cet60w cpe:2.3:o:lenovo:thinkpad_p72_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_s5_2nd_gen_firmware <= 1.28 cpe:2.3:o:lenovo:thinkpad_s5_2nd_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_t460_firmware <= 1.43.1.11 cpe:2.3:o:lenovo:thinkpad_t460_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_t490_firmware < n2iet96w cpe:2.3:o:lenovo:thinkpad_t490_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_t590_firmware < n2iet96w cpe:2.3:o:lenovo:thinkpad_t590_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_s2_gen_6_firmware <= 2021-09-30 cpe:2.3:o:lenovo:thinkpad_s2_gen_6_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_s2_yoga_gen_6_firmware <= 2021-09-30 cpe:2.3:o:lenovo:thinkpad_s2_yoga_gen_6_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_x12_detachable_gen_1_firmware < 1.16 cpe:2.3:o:lenovo:thinkpad_x12_detachable_gen_1_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_x260_firmware <= 1.47\/1.15 cpe:2.3:o:lenovo:thinkpad_x260_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_x380_yoga_firmware <= 1.34 cpe:2.3:o:lenovo:thinkpad_x380_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_x390_yoga_firmware < n2let87w cpe:2.3:o:lenovo:thinkpad_x390_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad_11e_5th_gen_firmware <= 1.13 cpe:2.3:o:lenovo:thinkpad_11e_5th_gen_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-3718

cvelogic Threat Intelligence