Detections
Analytics

CVE-2021-21551

high

Description

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.

References

https://thehackernews.com/2026/08/uat-10147-uses-ai-to-scale-server.html

https://blog.talosintelligence.com/uat-10147-deploys-spectre-a-cross-platform-implant-with-linux-rootkit-and-byovd-capabilities/

https://thehackernews.com/2025/04/new-tcesb-malware-found-in-active.html

https://github.com/ethanedits/iqvw64e-privilege-escalation

https://github.com/IlanDudnik/CVE-2021-21551

https://github.com/nanabingies/CVE-2021-21551

https://github.com/tijme/kernel-mii

https://github.com/nanabingies/Driver-RW

https://github.com/Creamy-Chicken-Soup/writeups-about-analysis-CVEs-and-Exploits-on-the-Windows

https://github.com/ihack4falafel/Dell-Driver-EoP-CVE-2021-21551

https://github.com/arnaudluti/PS-CVE-2021-21551

https://github.com/waldo-irc/CVE-2021-21551

https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21551

http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html

http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html

Details

Source: Mitre, NVD

Published: 2021-05-04

Updated: 2026-06-17

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.79249