CVE-2021-44968: A Use after Free vulnerability exists in IOBit Advanced SystemCare 15 pro via requests sent in sequential orde

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HIGH 7.8DOWNGRADE

CVE-2021-44968 is a high-severity flaw (CVSS 7.8) affecting advanced systemcare. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Use after Free vulnerability exists in IOBit Advanced SystemCare 15 pro via requests sent in sequential order using the IOCTL driver codes, which could let a malicious user execute arbitrary code or a Denial of Service (system crash). IOCTL list: iobit_ioctl = [0x8001e01c, 0x8001e020, 0x8001e024, 0x8001e040,0x8001e044, 0x8001e048, 0x8001e04c, 0x8001e000, 0x8001e004, 0x8001e008, 0x8001e00c, 0x8001e010, 0x8001e014, 0x8001e018]

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-416
Published	2022-02-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: iobit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-02-18 18:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

iobit advanced systemcare DOWNGRADE

Affected: 15

Fixed in: no fixed release known

Safe to downgrade to: a release before 15

1. Check installed version

apt-cache policy advanced-systemcare || rpm -q advanced-systemcare || advanced-systemcare --version

2. No fixed release: DOWNGRADE to a release before 15 (Debian / Ubuntu)

apt-cache madison advanced-systemcare sudo apt install advanced-systemcare=<VERSION_BEFORE_15> sudo apt-mark hold advanced-systemcare

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list advanced-systemcare sudo dnf downgrade advanced-systemcare-<VERSION_BEFORE_15> sudo dnf versionlock add advanced-systemcare

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-44968?

advanced systemcare: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-44968 being exploited?

CVE-2021-44968 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-44968 affect?

CVE-2021-44968 affects advanced systemcare. Severity is high (CVSS 7.8). A Use after Free vulnerability exists in IOBit Advanced SystemCare 15 pro via requests sent in sequential order using the IOCTL driver codes, which could let a malicious user execute arbitrary code or a Denial of Service (system crash). IOC

How urgent is CVE-2021-44968?

Priority 42/100. High severity; Public exploit reference

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References

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