CVE-2021-3786

lowpriority · track · 22EPSS 0.002 · 14 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.23% (14th) EPSS

CVSS 2.1 · low

Is it mine?

137 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A potential vulnerability in the SMI callback function used in CSME configuration of some Lenovo Notebook and ThinkPad systems could be used to leak out data out of the SMRAM range.

cvss

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

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.1–5.5

v2.02.1lowAV:L/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:Hsecondary · psirt@lenovo.comexploitability 0.8 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

affected products (137)

Products and version ranges known to be affected.

Lenovo Notebook and ThinkPad BIOSall versionsenisa_euvdEU
lenovo ideapad s940-14iwl firmware≤ 12.0.81.1753nvdUScpe:2.3:o:lenovo:ideapad_s940-14iwl_firmware:*:*:*:*:*:*:*:*
lenovo ideapad yoga s940-14iwl firmware≤ 12.0.81.1753nvdUScpe:2.3:o:lenovo:ideapad_yoga_s940-14iwl_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 10 firmware< 2021-10-25nvdUScpe:2.3:o:lenovo:thinkpad_10_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 3rd gen firmware< 2021-10-31nvdUScpe:2.3:o:lenovo:thinkpad_11e_3rd_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e 4th gen firmware< 2021-10-31nvdUScpe:2.3:o:lenovo:thinkpad_11e_4th_gen_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 11e yoga gen 6 firmware< 2021-10-31nvdUScpe:2.3:o:lenovo:thinkpad_11e_yoga_gen_6_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 13 gen 2 firmware< 2021-10-31nvdUScpe:2.3:o:lenovo:thinkpad_13_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad 25 firmware< n1qet92wnvdUScpe:2.3:o:lenovo:thinkpad_25_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e14 firmware≤ 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e14_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e14 gen 2 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e14_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e14 gen 3 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e14_gen_3_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e15 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e15_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e15 gen 2 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e15_gen_2_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e15 gen 3 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e15_gen_3_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e470 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e470_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e480 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e480_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e490 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e490_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e570 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e570_firmware:*:*:*:*:*:*:*:*
lenovo thinkpad e580 firmware< 2021-10-15nvdUScpe:2.3:o:lenovo:thinkpad_e580_firmware:*:*:*:*:*:*:*:*

showing 20 of 137

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.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan