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CVE-2021-21551

94
FAUCET Score

CVE-2021-21551 is an insufficient access control vulnerability in the Dell dbutil_2_3.sys driver, affecting Dell products. This high-severity vulnerability (CVSS 7.8) allows a local authenticated user to achieve escalation of privileges, denial of service, or information disclosure with low attack complexity. It is actively exploited in the wild, with public exploit modules available in Metasploit and ExploitDB, and has garnered significant community and media attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3CPE matchmatch criteria
cpe:2.3:a:dell:dbutil:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
53.12%
Probability of exploitation in next 30 days
EPSS Percentile
98.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Mar 31, 2022
Metasploit: Dell DBUtil_2_3.sys IOCTL memmove · May 4, 2021
ExploitDB: EDB-49893 · May 21, 2021
This CVE's current EPSS score of 0.5312 is in the 100th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html
ExploitThird Party AdvisoryVDB Entry
dell.com / support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability
MitigationVendor Advisory