CVE-2021-21551highunder attackCWE-782

CVE-2021-21551: high-severity vulnerability in Dell dbutil

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100Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 8.8epss 80%
from disclosure to weapon9 days
Published on NVDMay 4
1st PoC+9d
metasploitMay 4
CISA KEV+331d
Action required by CISAfederal deadline: 2022-04-21

Apply updates per vendor instructions.

In short

A flaw in Dell's dbutil_2_3.sys driver allows local users with account access to gain higher privileges, crash the system, or read sensitive data. This is dangerous because it lets ordinary users become administrators.

Technical detail

The dbutil_2_3.sys driver implements insufficient access control on privileged operations, allowing authenticated local users to escalate privileges, trigger denial of service conditions, or disclose kernel memory. Exploitation requires existing local authentication and interaction with the affected driver interface.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Dell · dbutil
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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