MEDIUM
CVE-2021-3718
CWE-232Published: November 12, 2021· Updated: Jun 17, 2026
4.6
CVSS v3.1
Official Description
A denial of service vulnerability was reported in some ThinkPad models that could cause a system to crash when the Enhanced Biometrics setting is enabled in BIOS.
Technical Analysis
CVE-2021-3718 requires local access, meaning attackers must already have a foothold on the target system.
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 availability disruption (denial of service), with a CVSS base score of 4.6.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Lenovo79 product(s)
thinkpad 11e 3rd gen firmwarethinkpad 11e 3rd genthinkpad 11e 4th gen i3 firmwarethinkpad 11e 4th gen i3thinkpad 11e 4th gen i7 firmwarethinkpad 11e 4th gen i7thinkpad 11e 4th gen i5 firmwarethinkpad 11e 4th gen i5thinkpad 11e 4th gen celeron firmwarethinkpad 11e 4th gen celeronthinkpad 11e yoga gen 6 firmwarethinkpad 11e yoga gen 6+67
Linux1 product(s)
linux kernel
Microsoft3 product(s)
windows 10windows 7windows 8.1
Source: NVD CPE · 83 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
All References (2)
→
https://support.lenovo.com/us/en/product_security/LEN-72619Vendor Advisory
→
https://support.lenovo.com/us/en/product_security/LEN-72619Vendor Advisory
Quick Facts
CVE IDCVE-2021-3718
CVSS Score4.6 / 10
SeverityMEDIUM
WeaknessCWE-232
CISA KEVNo
Affected3 vendor(s)
PublishedNov 12, 2021
Related CVEs (CWE-232)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-3718 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.