VULNERABILITY INTELLIGENCE

CVE-2021-21556

CVSS score6.1 MEDIUM
EPSS probability0.31%
CISA KEVNot currently listed
Published2021-06-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L

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.

Weakness classification

  • security_alert@emc.com: CWE-121
  • nvd@nist.gov: CWE-787

Primary references