Is CVE-2021-21551 exploited in the wild?

Yes. CVE-2021-21551 is known to be exploited in the wild, first recorded on 31 March 2022. Treat it as urgent.

How severe is CVE-2021-21551?

Critical severity, with a CVSS score of 8.8, published 31 March 2022.

Which products and versions are affected?

Dell dbutil_2_3.sys driver up to (including) 2.3.

Is there a fix for CVE-2021-21551?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2021-21551 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2021-21551?

Check whether you run Dell dbutil Driver. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2021-21551: Dell dbutil Driver Insufficient Access Control Vulnerability

CVE-2021-21551 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-03-31

The Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability (exposed IOCTL). A local authenticated attacker can exploit this to escalate privileges, cause a denial-of-service, or disclose sensitive information.

Vendors: Dell.

Quick answers

Is CVE-2021-21551 exploited in the wild?: Yes. CVE-2021-21551 is known to be exploited in the wild, first recorded on 31 March 2022. Treat it as urgent.
How severe is CVE-2021-21551?: Critical severity, with a CVSS score of 8.8, published 31 March 2022.
Which products and versions are affected?: Dell dbutil_2_3.sys driver up to (including) 2.3.
Is there a fix for CVE-2021-21551?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-21551 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2021-21551?: Check whether you run Dell dbutil Driver. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

Dell dbutil_2_3.sys driver up to (including) 2.3

Timeline

2022-03-31: disclosed
2022-03-31: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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