CVE-2021-44968Public exploit

Local code execution via sequential driver IOCTLs

Published Feb 18, 2022 · Updated Aug 4, 2024

Use-after-free in IObit Advanced SystemCare 15 Pro allows local users to execute arbitrary code or crash the system through driver IOCTLs. The AscRegistryFilter.sys driver mishandles object lifetime across sequential IOCTL requests and subsequently accesses freed memory. A low-privileged local account can reach the driver interface, enabling memory corruption, arbitrary code execution, or a system crash.

CVSS severity7.8
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in IObit Advanced SystemCare 15 Pro allows local users to execute arbitrary code or crash the system through driver IOCTLs. The AscRegistryFilter.sys driver mishandles object lifetime across sequential IOCTL requests and subsequently accesses freed memory. A low-privileged local account can reach the driver interface, enabling memory corruption, arbitrary code execution, or a system crash.

The record

CVE
CVE-2021-44968
Published
Feb 18, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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