CVE-2021-21571

Home/CVE/Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper ce

CVE

Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper ce

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.

MEDIUM · CVSS 5.9 EPSS 0.00272

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

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Weakness Classification

CWE-295Improper Certificate Validation

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Affected Products & Versions

dell alienware m15 r6 firmware< 1.3.3
dell chengming 3990 firmware< 1.4.1
dell chengming 3991 firmware< 1.4.1
dell g15 5510 firmware< 1.4.0
dell g15 5511 firmware< 1.3.3
dell g3 3500 firmware< 1.9.0
dell g5 5500 firmware< 1.9.0
dell g7 7500 firmware< 1.9.0
Show all 60 affected productsdell g7 7700 firmware< 1.9.0
dell inspiron 14 5418 firmware< 2.1.0_a06
dell inspiron 15 5518 firmware< 2.1.0_a06
dell inspiron 15 7510 firmware< 1.0.4
dell inspiron 3501 firmware< 1.6.0
dell inspiron 3880 firmware< 1.4.1
dell inspiron 3881 firmware< 1.4.1
dell inspiron 3891 firmware< 1.0.11
dell inspiron 5300 firmware< 1.7.1
dell inspiron 5301 firmware< 1.8.1
dell inspiron 5310 firmware< 2.1.0
dell inspiron 5400 2-in-1 firmware< 1.7.0
dell inspiron 5400 aio firmware< 1.4.0
dell inspiron 5401 firmware< 1.7.2
dell inspiron 5401 aio firmware< 1.4.0
dell inspiron 5402 firmware< 1.5.1
dell inspiron 5406 2n1 firmware< 1.5.1
dell inspiron 5408 firmware< 1.7.2
dell inspiron 5409 firmware< 1.5.1
dell inspiron 5410 2-in-1 firmware< 2.1.0
dell inspiron 5501 firmware< 1.7.2
dell inspiron 5502 firmware< 1.5.1
dell inspiron 5508 firmware< 1.7.2
dell inspiron 5509 firmware< 1.5.1
dell inspiron 7300 firmware< 1.8.1
dell inspiron 7300 2-in-1 firmware< 1.3.0
dell inspiron 7306 2-in-1 firmware< 1.5.1
dell inspiron 7400 firmware< 1.8.1
dell inspiron 7500 firmware< 1.8.0
dell inspiron 7500 2-in-1 firmware< 1.3.0
dell inspiron 7501 firmware< 1.8.0
dell inspiron 7506 firmware< 1.5.1
dell inspiron 7610 firmware< 1.0.4
dell inspiron 7700 aio firmware< 1.4.0
dell inspiron 7706 2-in-1 firmware< 1.5.1
dell latitude 3120 firmware< 1.1.0
dell latitude 3320 firmware< 1.4.0
dell latitude 3410 firmware< 1.9.0
dell latitude 3420 firmware< 1.8.0
dell latitude 3510 firmware< 1.9.0
dell latitude 3520 firmware< 1.8.0
dell latitude 5310 firmware< 1.7.0
dell latitude 5310 2-in-1 firmware< 1.7.0
dell latitude 5320 firmware< 1.7.1
dell latitude 5320 2-in-1 firmware< 1.7.1
dell latitude 5410 firmware< 1.6.0
dell latitude 5411 firmware< 1.6.0
dell latitude 5420 firmware< 1.8.0
dell latitude 5510 firmware< 1.6.0
dell latitude 5511 firmware< 1.6.0
dell latitude 5520 firmware< 1.7.1
dell latitude 5521 firmware< 1.3.0_a03

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Scoring & Timeline

5.9

MEDIUM · CVSS v3.1 · security_alert@emc.com

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Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD24 Jun 2021 · 05:15 PM

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

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://www.dell.com/support/kbdoc/en-us/000188682Vendor Advisory

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