Home/CVE/A potential vulnerability in the SMI function to access EEPROM in some ThinkPad models may allow an attacker with local
CVE

CVE-2021-3843

A potential vulnerability in the SMI function to access EEPROM in some ThinkPad models may allow an attacker with local

A potential vulnerability in the SMI function to access EEPROM in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.

MEDIUM · CVSS 6.7 EPSS 0.00037
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

32
lenovo thinkpad 11e 3rd gen firmware<= 1.22
lenovo thinkpad 11e 3rd gen firmware<= 1.29
lenovo thinkpad 11e 4th gen i3 firmware<= 1.22
lenovo thinkpad 11e 4th gen i7 firmware<= 1.22
lenovo thinkpad 11e 4th gen i5 firmware<= 1.22
lenovo thinkpad 11e 4th gen celeron firmware<= 1.27
lenovo thinkpad 11e yoga gen 6 firmware<= 1.12
lenovo thinkpad 13 gen 2 firmware<= 1.29
▣

Scoring & Timeline

6.7
MEDIUM · CVSS v3.1 · psirt@lenovo.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Nov 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.lenovo.com/us/en/product_security/LEN-72619Vendor Advisory
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