2021-3614 | Lenovo Notebook BIOS Update Local Privilege Escalation (LEN-65529)

CVSS Meta Temp Score

CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.

Current Exploit Price (≈)

Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.

CTI Interest Score

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6.6 $0-$5k 1.49

A vulnerability, which was classified as critical, was found in Lenovo Notebook (the affected version unknown). This affects an unknown code of the component BIOS Update Handler. CWE is classifying the issue as CWE-636. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability was reported on some Lenovo Notebook systems that could allow an attacker with physical access to elevate privileges under certain conditions during a BIOS update performed by Lenovo Vantage.

The weakness was presented 07/17/2021 as LEN-65529. The advisory is shared at support.lenovo.com. This vulnerability is uniquely identified as CVE-2021-3614 since 06/23/2021. The exploitability is told to be easy. An attack has to be approached locally. A authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/19/2021).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.



VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.6
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

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Vector Complexity Authentication Confidentiality Integrity Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Unknown
CWE: CWE-636
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

06/23/2021 CVE assigned
07/17/2021 +24 days Advisory disclosed
07/17/2021 +0 days VulDB entry created
07/19/2021 +2 days VulDB last updateVendor: https://www.lenovo.com/

Advisory: LEN-65529
Status: Confirmed

CVE: CVE-2021-3614 (🔒)

Created: 07/17/2021 09:58
Updated: 07/19/2021 22:17
Changes: (2) vulnerability_cwe source_cve_cna
Complete: 🔍


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