CVE-2021-3897 | BDVDB-2026-174682 Detail

LenovoFan Power Controller2 (FPC2)

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-288 Authentication Bypass Using an Alternate Path or Channel

References#

https://support.lenovo.com/us/en/product_security/LEN-72615

Exploit#

No public exploit known

History#

Version 12022-04-22Record published in the CVE List.
Version 22024-08-03Most recent update recorded in the CVE List.

Published

Published: 2022-04-22
Last modified: 2024-08-03

Vendor information

Vendor: Lenovo
Product: Fan Power Controller2 (FPC2)

All Lenovo vulnerabilities

Score

9.8 Critical

EPSS

1.2%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 70.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
various
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).