Medium severity6.1NVD Advisory· Published Jun 14, 2021· Updated Jun 17, 2026
CVE-2021-21556
CVE-2021-21556
Description
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a stack-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.
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Affected products
2- Range: unspecified
Patches
Vulnerability mechanics
References
1- www.dell.com/support/kbdoc/000187958nvdVendor Advisory
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