CVE-2021-21571 MEDIUM

CVE-2021-21571

Vendor Dell
Product UEFI BIOS https stack
Weakness CWE-295
Published June 24, 2021
Last update September 16, 2024

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

What the vulnerability does

01Description

Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. A remote unauthenticated attacker may exploit this vulnerability using a person-in-the-middle attack which may lead to a denial of service and payload tampering.

Key dates

02Disclosure timeline

June 24, 2021 CVE published
September 16, 2024 Record updated