CVE-2021-3897

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.

Remediation

Solution:

  • Upgrade to the firmware version (or newer) indicated for your model in the Product Impact section in LEN-72615.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Vendor Advisory lenovo.com
Affected: Lenovo Fan Power Controller2 (FPC2)
Affected: Lenovo Lenovo System Management Module (SMM)
Published at:
Updated at:

References

Link Tags
https://support.lenovo.com/us/en/product_security/LEN-72615 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3897?
CVE-2021-3897 has been scored as a critical severity vulnerability.
How to fix CVE-2021-3897?
To fix CVE-2021-3897: Upgrade to the firmware version (or newer) indicated for your model in the Product Impact section in LEN-72615.
Is CVE-2021-3897 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3897 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3897?
CVE-2021-3897 affects Lenovo Fan Power Controller2 (FPC2), Lenovo Lenovo System Management Module (SMM).
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.