Background exploitation KEV catalog
CVE-2021-21551

Dell dbutil Driver Insufficient Access Control Vulnerability

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.

CheckOps priority index
7.7/10 Patch within 7 days
Severity8.8
Probability8.0
Exploitation3/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 79.6% higher than 99.6% of CVEs
CVSS 3.1 8.8 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:
Exploited for 1,678 days 31 Mar 2022
CISA due date 21 Apr 2022 for US federal agencies

Exploitation probability EPSS · FIRST

05010026 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 3 / 5

  • KEV catalog (CISA)31 Mar 2022
  • Exploited in EUVD (ENISA)31 Mar 2022
  • Used by ransomwareno
  • EPSS above 10 %79.6%
  • No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

dbutildbutil Driver
Affected versions
  • 2.3
Weaknesses (CWE)

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 80.1%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2026-22769Dell RecoverPoint for Virtual Machines (RP4VMs) Use of Hard-coded Credentials Vulnerability
    6.8 · Background exploitation

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities