CVE-2021-21551
Dell dbutil Driver Insufficient Access Control Vulnerability
- Published
- May 4, 2021
- Updated
- Oct 21, 2025
- Assigning CNA
- dell
- Evidence observed
- May 21, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.6%
- Model date
- Oct 18, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of service, or information disclosure. Local authenticated user access is required.
Sources
modules/exploits/windows/local/cve_2021_21551_dbutil_memmove.rb
Metasploit Framework modulesDeclared conditions
- platform: Windows($.exploit_windows/local/cve_2021_21551_dbutil_memmove.platform)
- verification: check_declared($.exploit_windows/local/cve_2021_21551_dbutil_memmove.check)
Proof-of-concept exploit for CVE-2021-21551 targeting Dell's dbutil_2_3 driver to achieve code execution on systems with HVCI disabled.
Responsible use
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