CVE-2021-21551
Dell dbutil Driver Insufficient Access Control Vulnerability
- High 8.8
- Exploited: added to CISA KEV 31 Mar 2022
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.
Key facts
- Published
- 4 May 2021
- Last changed
- 21 Oct 2025
- Assigned by
- dell
- KEV added
- 31 Mar 2022
- KEV fix due
- 21 Apr 2022
- EPSS
- 79.628% likely to be exploited in the next 30 days, higher than 99.612% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.8CVSS 3.1, Highfrom the CNA (dell)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Dell | dbutil |
|
Timeline
- 4 May 2021 Published
- 31 Mar 2022 CVE-2021-21551 added to CISA KEV
- 31 Mar 2022 Added to the CISA KEV catalogue