HOMEVULNERABILITIESCVE-2021-21792
MEDIUM

CVE-2021-21792

CWE-782Published: August 5, 2021· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

An information disclosure vulnerability exists in the the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O read requests. A specially crafted I/O request packet (IRP) can lead to privileged reads in the context of a driver which can result in sensitive information disclosure from the kernel. The IN instruction can read four bytes from the given I/O device, potentially leaking sensitive device data to unprivileged users.

NVD Source

Technical Analysis

CVE-2021-21792 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

iobit1 product(s)
advanced systemcare ultimate
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1255
ADVISORYhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1255

All References (2)

→
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1255Exploit · Third Party Advisory
→
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1255Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-21792
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-782
CISA KEVNo
Affected1 vendor(s)
PublishedAug 5, 2021

Related CVEs (CWE-782)

CVE-2024-39251
10.0
CVE-2024-4196
9.8
CVE-2024-30804
9.8
CVE-2024-32370
9.8
CVE-2024-33220
8.8
CVE-2021-21787
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-21792 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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