CVE-2021-3786
4.4 · MEDIUMOverview
CVE-2021-3786 is a medium-severity vulnerability affecting lenovo thinkpad_x380_yoga_firmware. It was published on November 12, 2021 and has a CVSS 3.1 base score of 4.4 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from lenovo. Update thinkpad_x380_yoga_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| lenovo | thinkpad_x380_yoga_firmware | >= 0, < 2020-10-31 | Affected |
| lenovo | thinkpad_x1_fold_gen_1_firmware | >= 0, < 2021-10-29 | Affected |
| lenovo | thinkpad_yoga_260_firmware | >= 0, < 2021-10-25 | Affected |
| lenovo | thinkpad_yoga_11e_3rd_gen_firmware | >= 0, < 2021-10-31 | Affected |
| lenovo | thinkpad_yoga_15_firmware | >= 0, < n19et66w | Affected |
| lenovo | thinkpad_yoga_370_firmware | >= 0, < 2021-10-31 | Affected |
| lenovo | thinkpad_x12_detachable_gen_1_firmware | >= 0, < 2021-10-31 | Affected |
| lenovo | thinkpad_x390_firmware | >= 0, < n2jet96w | Affected |
| lenovo | thinkpad_yoga_11e_4th_gen_firmware | >= 0, < 2021-10-31 | Affected |
| lenovo | thinkpad_yoga_11e_5th_gen_firmware | >= 0, < 2021-10-31 | Affected |
Frequently Asked Questions
What is CVE-2021-3786?
CVE-2021-3786 is a medium-severity vulnerability affecting lenovo thinkpad_x380_yoga_firmware. It was published on November 12, 2021 and has a CVSS 3.1 base score of 4.4 (MEDIUM).
How severe is CVE-2021-3786?
This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-3786?
Check the references section for vendor advisories and patches from lenovo. Update thinkpad_x380_yoga_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3786?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3786 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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