Home/CVE/Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A lo
CVE

CVE-2021-21557

Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A lo

Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of service, arbitrary code execution, or information disclosure in System Management Mode.

HIGH · CVSS 8.1 EPSS 0.00024
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-20Improper Input Validation
▤

Affected Products & Versions

31
dell poweredge r640 firmware< 2.11.2
dell poweredge r740 firmware< 2.11.2
dell poweredge r740xd firmware< 2.11.2
dell poweredge r940 firmware< 2.11.2
dell poweredge r540 firmware< 2.11.2
dell poweredge r440 firmware< 2.11.2
dell poweredge t440 firmware< 2.11.2
dell poweredge xr2 firmware< 2.11.2
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · security_alert@emc.com
View on NVD
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 NVD14 Jun 2021 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L
🔗

References & Sources

1
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/000187958PatchVendor Advisory
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