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Vulnerabilities

Vulnerability · CVE-2021-21551

Dell dbutil Driver Insufficient Access Control Vulnerability

Published May 4, 2021 · catalog updated Jun 16, 2026 · Dell dbutil Driver

Patch now

CVE-2021-21551 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Dell dbutil Driver against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
79.25%
Remediation
Remediation guidance
Affected products
cpe dell/dbutil · vendor Dell dbutil Driver

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe dell/dbutilversion unspecified
  • vendor Dell dbutil Driverversion unspecified

How to fix CVE-2021-21551

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-21551 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Dell dbutil Driver against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-782. EPSS 79.25%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 4, 2021 · Catalog

    Detected

    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.

  2. Mar 31, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 21, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-21551

    Dell dbutil driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial-of-service (DoS), or information disclosure.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-21551

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-21551

    30-day exploitation probability 79.2%

    first.org
  • Exploit DatabasePublic exploit reference49893

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_windows/local/cve_2021_21551_dbutil_memmove

    Public module reference (good). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit ModulesPublic exploit modulepost_windows/manage/dell_memory_protect

    Public module reference (manual). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2021-21551

    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.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2021-21551

    Dell dbutil driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial-of-service (DoS), or information disclosure.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.