CVE-2021-3843

highpriority · track · 27EPSS 0.003 · 20 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (20th) EPSS

CVSS 7.2 · high

Is it mine?

33 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A potential vulnerability in the SMI function to access EEPROM in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.2

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.8 · impact 5.9

v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@lenovo.comexploitability 0.8 · impact 5.9

v3.16.1mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

affected products (33)

Products and version ranges known to be affected.

Lenovo ThinkPad BIOSall versionsenisa_euvdEU
lenovo thinkpad 11e 3rd gen firmware≤ 1.29nvdUScpe:2.3:o:lenovo:thinkpad_11e_3rd_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 3rd gen firmware≤ 1.22nvdUScpe:2.3:o:lenovo:thinkpad_11e_3rd_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 4th gen celeron firmware≤ 1.27nvdUScpe:2.3:o:lenovo:thinkpad_11e_4th_gen_celeron_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 4th gen i3 firmware≤ 1.22nvdUScpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i3_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 4th gen i5 firmware≤ 1.22nvdUScpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i5_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 4th gen i7 firmware≤ 1.22nvdUScpe:2.3:o:lenovo:thinkpad_11e_4th_gen_i7_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 5th gen firmware≤ 1.13nvdUScpe:2.3:o:lenovo:thinkpad_11e_5th_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e yoga gen 6 firmware≤ 1.12nvdUScpe:2.3:o:lenovo:thinkpad_11e_yoga_gen_6_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 13 gen 2 firmware≤ 1.29nvdUScpe:2.3:o:lenovo:thinkpad_13_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 firmware≤ 1.31nvdUScpe:2.3:o:lenovo:thinkpad_l13_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 gen 2 firmware≤ 1.08nvdUScpe:2.3:o:lenovo:thinkpad_l13_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 gen 2 firmware≤ 1.11nvdUScpe:2.3:o:lenovo:thinkpad_l13_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 yoga firmware≤ 1.31nvdUScpe:2.3:o:lenovo:thinkpad_l13_yoga_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 yoga gen 2 firmware≤ 1.08nvdUScpe:2.3:o:lenovo:thinkpad_l13_yoga_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l13 yoga gen 2 firmware≤ 1.11nvdUScpe:2.3:o:lenovo:thinkpad_l13_yoga_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l14 firmware< 1.20.1.17nvdUScpe:2.3:o:lenovo:thinkpad_l14_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l14 gen 1 firmware< 1.15nvdUScpe:2.3:o:lenovo:thinkpad_l14_gen_1_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l15 firmware< 1.20.1.17nvdUScpe:2.3:o:lenovo:thinkpad_l15_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad l15 gen 1 firmware< 1.15nvdUScpe:2.3:o:lenovo:thinkpad_l15_gen_1_firmware:*:*:*:*:*:*:*:*

showing 20 of 33

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-11-12modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

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