Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.
VOLERION
Volerion Security Research

NOT DEFERRED DATABASE

VULNERABILITIES

CVE-2021-21789 Details

Description

A privilege escalation vulnerability exists in the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O write requests. During IOCTL 0x9c40a0e0, the first dword passed in the input buffer is the device port to write to and the dword at offset 4 is the value to write via the OUT instruction. A local attacker can send a malicious IRP to trigger this vulnerability.

Metrics

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1254 CVEExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1254 [email protected]ExploitThird Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
NVD-CWE-OtherWeakness Not in a Standard CWE Category[email protected]
CWE-782Exposed IOCTL with Insufficient Access Control[email protected]

Affected Products

ProductVersions
iobit advanced systemcare ultimate
14.2.0.220

CPE

  • cpe:2.3:a:iobit:advanced_systemcare_ultimate:14.2.0.220:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

9 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-21789
NVD Published Date:
Jul 7, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-21789 Details - Not Deferred