HOMEVULNERABILITIESCVE-2021-3897
CRITICAL

CVE-2021-3897

CWE-288Published: April 22, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-3897 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

IBM2 product(s)
nextscale fan power controller firmwarenextscale fan power controller
Lenovo8 product(s)
nextscale n1200 enclosure firmwarenextscale n1200 enclosurethinkagile hx enclosure certified node firmwarethinkagile hx enclosure certified nodethinkagile vx enclosure firmwarethinkagile vx enclosurethinksystem d2 enclosure firmwarethinksystem d2 enclosure
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (2)

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

Quick Facts

CVE IDCVE-2021-3897
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-288
CISA KEVNo
Affected2 vendor(s)
PublishedApr 22, 2022

Related CVEs (CWE-288)

CVE-2026-20079
10.0
CVE-2026-48020
10.0
CVE-2026-53622
10.0
CVE-2026-48491
10.0
CVE-2024-2973
10.0
CVE-2024-2013
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-3897 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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