CVE-2021-21551

8.8 HIGH CISA KEV - Actively Exploited

Published: May 04, 2021 Modified: October 28, 2025

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

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

Source: security_alert@emc.com

Exploit Third Party Advisory VDB Entry

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

Source: security_alert@emc.com

Exploit Third Party Advisory VDB Entry

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

Source: security_alert@emc.com

Mitigation Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory VDB Entry

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

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory VDB Entry

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

Source: af854a3a-2127-422b-91ae-364da2661108

Mitigation Vendor Advisory

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

8.8 / 10.0

EPSS (Exploit Probability)

72.2%

99th percentile

Exploitation Status

Actively Exploited

Remediation due: 2022-04-21

Weaknesses (CWE)

CWE-782

Affected Vendors

dell

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