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MEDIUM · 6.1

CVE-2021-21555

Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a heap-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious use...

Vulnerability Description

Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a heap-based buffer overflow vulnerability in systems with NVDIMM-N installed. 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 UEFI or BIOS Preboot Environment.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW

Affected Products

VendorProductVersions
DellPoweredge R640 Firmware< 2.11.2
DellPoweredge R640-
DellPoweredge R740 Firmware< 2.11.2
DellPoweredge R740-
DellPoweredge R740Xd Firmware< 2.11.2
DellPoweredge R740Xd-
DellPoweredge R940 Firmware< 2.11.2
DellPoweredge R940-
DellPoweredge R840 Firmware< 2.11.2
DellPoweredge R840-
DellPoweredge R940Xa Firmware< 2.11.2
DellPoweredge R940Xa-
DellPoweredge T640 Firmware< 2.11.2
DellPoweredge T640-
DellPoweredge Mx740C Firmware< 2.11.2
DellPoweredge Mx740C-
DellPoweredge Mx840C Firmware< 2.11.2
DellPoweredge Mx840C-

Related Weaknesses (CWE)

CWE-122CWE-787

References

FAQ

What is CVE-2021-21555?

CVE-2021-21555 is a vulnerability with a CVSS score of 6.1 (MEDIUM). Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a heap-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious use...

How severe is CVE-2021-21555?

CVE-2021-21555 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-21555?

Check the references section above for vendor advisories and patch information. Affected products include: Dell Poweredge R640 Firmware, Dell Poweredge R640, Dell Poweredge R740 Firmware, Dell Poweredge R740, Dell Poweredge R740Xd Firmware.