What is the CVSS score of CVE-2020-8322?

CVE-2020-8322 has a CVSS 3.1 base score of 6.7 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

E42 80 Firmware CVE-2020-8322

MEDIUM

2020-06-09 psirt@lenovo.com

RCE Lenovo E42 80 Firmware E52 80 Firmware Miix 720 12Ikb Firmware 720S Touch 15Ikb Firmware 720S 15Ikb Firmware E53 80 Firmware V330 15Ikb Firmware V330 15Isk Firmware V730 15Ikb Firmware V330 15Igm Firmware 730S 13Iwl Firmware S940 14Iwl Firmware V110 14Ikb Firmware V130 15Ikb Firmware Wei5 15Ikb Firmware Yoga S730 13Iwl Firmware Yoga S940 14Iwl Firmware 330 14Ast Firmware 330 15Ast Firmware 330 17Ast Firmware 340C 15Api Firmware 340C 15Ast Firmware C640 Iml Firmware K22 80 Firmware V720 12 Firmware K32 80 Kbl Firmware K32 80 Skl Firmware S145 14Api Firmware S145 14Ast Firmware S145 15Api Firmware S145 15Ast Firmware S540 13Api Firmware S750 Iil Firmware Thinkbook 13S Iwl Firmware Thinkbook 14S Iwl Firmware V110 14Ast Firmware V110 15Ast Firmware V130 15Igm Firmware V310 15Igm Firmware V340 Iil Firmware V340 Iml Firmware V540S 13 Firmware 14Iwl Firmware V730 13Ikb Firmware V730 13Isk Firmware Xiaoxin 14 Ast Qc 2019 Firmware Xx 14Api Qc 2019 Firmware 6 Pro 13 Iwl Firmware 6 Pro 14 Iwl Firmware K3 Firmware K4 Iwl Firmware

6.7

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	CVSS score of 6.7 (MEDIUM). Attack characteristics: local attack vector, low complexity, high privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

A potential vulnerability in the SMI callback function used in the Legacy USB driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

A potential vulnerability in the SMI callback function used in the Legacy USB driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution. Affected products include: Lenovo 330-14Ast Firmware, Lenovo 330-15Ast Firmware, Lenovo 330-17Ast Firmware, Lenovo 340C-15Api Firmware, Lenovo 340C-15Ast Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.7 MEDIUM

AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

A potential vulnerability in the SMI callback function used in the Legacy USB driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution.

Threat Intelligence Overview

EPSS Score

0.3%

Top 77% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.3%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +34

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:lenovo:330-14ast_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:330-15ast_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:330-17ast_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:340c-15api_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:340c-15ast_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:720s_touch-15ikb_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:720s-15ikb_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:730s-13iwl_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:c640-iml_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:e42-80_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:e52-80_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:k22-80_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:v720-12_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:k32-80_kbl_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:k32-80_skl_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:miix_720-12ikb_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:s145-14api_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:s145-14ast_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:s145-15api_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:lenovo:s145-15ast_firmware:-:*:*:*:*:*:*:*

+ 31 more

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References

Advisories & patches

ADVISORY https://support.lenovo.com/us/en/product_security/LEN-30042

Search Externally

GitHub PoC

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