CVE-2021-21551 kev in the critical feed json
Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of serv…
published 5y ago modified 4mo ago also EUVD-2021-8823
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-03-31
- epss
- 79.6%
- EPSS 79.6% chance of exploitation in 30 days, percentile 99.6%
- public exploits
- 2
- Metasploit and Exploit-DB
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
Is CVE-2021-21551 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerTimeline
- First public exploit (Metasploit exploit/windows/local/cve_2021_21551_dbutil_memmove)
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4y ago
- Patch by
- 2022-04-21 (4y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Dell, dbutil Driver
- CISA name
- Dell dbutil Driver Insufficient Access Control Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
79.63% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit exploit/windows/local/cve_2021_21551_dbutil_memmove Dell DBUtil_2_3.sys IOCTL memmove metasploit exploit, good rank, 2021-05-04
- EDB-49893 DELL dbutil_2_3.sys 2.3 - Arbitrary Write to Local Privilege Escalation (LPE) local, 2021-05-21
- packetstormsecurity.com http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Dell dbutil
Classification
- Weakness
-
- CWE-782 Exposed IOCTL with Insufficient Access Control
References
-
packetstormsecurity.com
/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html
exploit, third-party-advisory, vdb-entry
-
packetstormsecurity.com
/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html
exploit, third-party-advisory, vdb-entry
-
dell.com
/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-
mitigation, vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21551
government-resource, us-government-resource
Sources
- CVE List CVE-2021-21551
- NVD CVE-2021-21551
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