{"id":"CVE-2021-21551","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21551","generatedAt":"2026-10-31T15:10:25.070Z","title":"Dell dbutil Driver Insufficient Access Control Vulnerability","description":"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.","published":"2021-05-04T16:15:08.000Z","lastModified":"2026-06-17T03:35:46.000Z","status":"Analyzed","sourceIdentifier":"security_alert@emc.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-782"],"affected":["dell/dbutil"],"epss":{"score":0.79628,"percentile":0.99605,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2022-03-31","dueDate":"2022-04-21","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-21551"},"exploits":{"count":1,"verified":false,"firstPublished":"2021-05-21","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49893,"kind":"exploit","title":"DELL dbutil_2_3.sys 2.3 - Arbitrary Write to Local Privilege Escalation (LPE)","url":"https://www.exploit-db.com/exploits/49893","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/local/49893.c++","file":"exploits/windows/local/49893.c++","published":"2021-05-21","added":"2021-05-21","updated":"2021-10-29","author":"Paolo Stagno","type":"local","platform":"windows","port":null,"verified":false,"codes":["CVE-2021-21551"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 21 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security_alert@emc.com"},{"url":"http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security_alert@emc.com"},{"url":"https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability","tags":["Mitigation","Vendor Advisory"],"source":"security_alert@emc.com"},{"url":"http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21551","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21551","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}