CVE-2021-21571

high-risk
Published 2021-06-24

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.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (20)

G5 5500 Firmware
G7 7500 Firmware
G7 7700 Firmware
Inspiron 15 7510 Firmware

Affected Vendors

Dell

References (2)

Vendor Advisory https://www.dell.com/support/kbdoc/en-us/000188682
Vendor Advisory https://www.dell.com/support/kbdoc/en-us/000188682
51
/ 100
high-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 32/34 · Critical