Medium severity · published Nov 12, 2021
CVE-2021-3843
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
6.7
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
T1
Thinkpad 11e 3rd Gen Firmware · Lenovo
through 1.22; through 1.29 · source: NVD
T1
Thinkpad 11e 4th Gen Celeron Firmware · Lenovo
through 1.27 · source: NVD
T1
Thinkpad 11e 4th Gen I3 Firmware · Lenovo
through 1.22 · source: NVD
T1
Thinkpad 11e 4th Gen I5 Firmware · Lenovo
through 1.22 · source: NVD
T1
Thinkpad 11e 4th Gen I7 Firmware · Lenovo
through 1.22 · source: NVD
T1
Thinkpad 11e 5th Gen Firmware · Lenovo
through 1.13; through 1.13 · source: NVD
T1
Thinkpad 11e Yoga Gen 6 Firmware · Lenovo
through 1.12 · source: NVD
T1
Thinkpad 13 Gen 2 Firmware · Lenovo
through 1.29 · source: NVD
TL
Thinkpad L13 Firmware · Lenovo
through 1.31 · source: NVD
TL
Thinkpad L13 Gen 2 Firmware · Lenovo
through 1.11; through 1.08 · source: NVD
TL
Thinkpad L13 Yoga Firmware · Lenovo
through 1.31 · source: NVD
TL
Thinkpad L13 Yoga Gen 2 Firmware · Lenovo
through 1.11; through 1.08 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3843
Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-72619
More from Thinkpad 11e 3rd Gen Firmware
4.6
CVE-2021-3718
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