CVE-2021-3897

highpriority · track · 39OT risk · elevatedEPSS 0.013 · 70 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.30% (70th) EPSS

CVSS 7.5 · high

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

An authentication bypass vulnerability was discovered in an internal service of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware during an that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@lenovo.comexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/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-288US

affected products (7)

Products and version ranges known to be affected.

Lenovo Fan Power Controller2 (FPC2)all versionsenisa_euvdEU
Lenovo Lenovo System Management Module (SMM)all versionsenisa_euvdEU
ibm nextscale fan power controller firmware< 44a-3.70nvdUScpe:2.3:o:ibm:nextscale_fan_power_controller_firmware:*:*:*:*:*:*:*:*
lenovo nextscale n1200 enclosure firmware< fhet50b-2.90nvdUScpe:2.3:o:lenovo:nextscale_n1200_enclosure_firmware:*:*:*:*:*:*:*:*
lenovo thinkagile hx enclosure certified node firmware< tesm28b-1.21nvdUScpe:2.3:o:lenovo:thinkagile_hx_enclosure_certified_node_firmware:*:*:*:*:*:*:*:*
lenovo thinkagile vx enclosure firmware< tesm28b-1.21nvdUScpe:2.3:o:lenovo:thinkagile_vx_enclosure_firmware:*:*:*:*:*:*:*:*
lenovo thinksystem d2 enclosure firmware< tesm28b-1.21nvdUScpe:2.3:o:lenovo:thinksystem_d2_enclosure_firmware:*:*:*:*:*:*:*:*

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 2022-04-22modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

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