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PatchSiren cyber security CVE debrief

CVE-2021-21551 Dell CVE debrief

CVE-2021-21551 is a Dell dbutil Driver insufficient access control vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-31, which makes it a high-priority remediation item for defenders. Use Dell’s update guidance and verify affected systems are patched or otherwise remediated.

Vendor
Dell
Product
dbutil Driver
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2022-03-31
Original CVE updated
2022-03-31
Advisory published
2022-03-31
Advisory updated
2022-03-31

Who should care

Dell endpoint and server administrators, vulnerability management teams, SOC analysts, and IT operations teams responsible for Windows fleets that may include the Dell dbutil Driver.

Technical summary

The available official records describe this issue as an insufficient access control vulnerability in Dell’s dbutil Driver. The supplied corpus does not include deeper impact details, so the safest defensive interpretation is that the driver may permit unauthorized access to driver functionality or related system behavior. Because CISA lists the CVE in KEV, it should be treated as known exploited and remediated promptly.

Defensive priority

High — CISA KEV-listed, with a required action to apply updates per vendor instructions.

Recommended defensive actions

  • Identify systems that include the Dell dbutil Driver, including workstations and servers managed through Dell tooling or imaging.
  • Apply Dell-provided updates or remediation guidance as soon as possible.
  • Confirm patched status across the fleet and remove or replace affected driver versions where applicable.
  • Prioritize remediation on high-value endpoints and systems with elevated access.
  • Monitor for unexpected driver-related activity and validate that endpoint protection and asset inventory reflect the remediation state.

Evidence notes

The debrief is based only on the supplied CVE metadata, CISA KEV record, and official reference links. CISA’s KEV entry identifies Dell as the vendor project, dbutil Driver as the product, and states the required action is to apply updates per vendor instructions. The provided notes also point to the NVD detail page for CVE-2021-21551. No exploit code, weaponized reproduction steps, or unverified impact details were used.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-21551 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-21551

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-21551 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-21551

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.