CVE-2021-3786
MEDIUM
5.5
CVSS Score
Published: November 12, 2021 at 10:05 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
267 products affected across 1 vendorThinkPad L390 YogaThinkPad X390 Yoga FirmwareThinkPad E490 Firmware
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
Description
A potential vulnerability in the SMI callback function used in CSME configuration of some Lenovo Notebook and ThinkPad systems could be used to leak out data out of the SMRAM range.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 12.0.81.1753
lenovo-ideapad-yoga-s940-14iwl (same device)
v < 2021-10-25
Affected range stops below 2021-10-25, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-10 (same device)
v < 2021-10-31
Affected range stops below 2021-10-31, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-11e-3rd-gen (same device)
v < 2021-10-31
Affected range stops below 2021-10-31, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-11e-4th-gen (same device)
v < 2021-10-31
Affected range stops below 2021-10-31, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-11e-yoga-gen-6 (same device)
v < 2021-10-31
Affected range stops below 2021-10-31, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-13-gen-2 (same device)
v < n1qet92w
Affected range stops below n1qet92w, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-25 (same device)
v ≤ 2021-10-15
v < 2021-10-15
Affected range stops below 2021-10-15, so it looks safe — our inference, not a vendor statement
lenovo-thinkpad-e14-gen-2 (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://support.lenovo.com/us/en/product_security/LEN-67440CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo
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