# CVE-2021-21551: Dell dbutil Driver Insufficient Access Control Vulnerability

> CVE-2021-21551: Dell dbutil Driver Insufficient Access Control Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-21551
Last updated: 2025-10-21T23:25:47Z

- Published: 2021-05-04 15:15 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: dell
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS: 79.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-31, federal due date 2022-04-21, ransomware use: Unknown
- CWE: CWE-782

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Dell: dbutil

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-21551)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-21551)
- [http://packetstormsecurity.com/files/162604/Dell-DBUtil\_2\_3.sys-IOCTL-Memory-Read-Write.html](http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html)
- [http://packetstormsecurity.com/files/162739/DELL-dbutil\_2\_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html](http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html)
- [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.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-21551 · Markdown: https://rewindex.com/cve/CVE-2021-21551.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-21551 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:21.913Z