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.
Published 2021-06-24 17:15:08
Updated 2021-07-02 14:27:49
Source Dell
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2021-21571

Exploit prediction scoring system (EPSS) score for CVE-2021-21571

0.18%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 55 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21571

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
MEDIUM AV:N/AC:M/Au:N/C:N/I:P/A:P
8.6
4.9
NIST
6.5
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
2.2
4.2
NIST
5.9
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
1.6
4.2
Dell

CWE ids for CVE-2021-21571

References for CVE-2021-21571

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