CVE-2016-20059: IObit Malware Fighter 4.3.1 contains an unquoted service path vulnerability in the IMFservice and LiveUpdateSv

Q: How do I fix CVE-2016-20059?

malware fighter: upgrade to newer than 4.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2016-20059 being exploited?

CVE-2016-20059 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-20059 affect?

CVE-2016-20059 affects malware fighter. Severity is high (CVSS 7.8). IObit Malware Fighter 4.3.1 contains an unquoted service path vulnerability in the IMFservice and LiveUpdateSvc services that allows local attackers to escalate privileges. Attackers can insert a malicious executable file in the unquoted se

Q: How urgent is CVE-2016-20059?

Priority 34/100. High severity; Public exploit reference

Routine

HIGH 7.8UPGRADE

CVE-2016-20059 is a high-severity flaw (CVSS 7.8) affecting malware fighter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IObit Malware Fighter 4.3.1 contains an unquoted service path vulnerability in the IMFservice and LiveUpdateSvc services that allows local attackers to escalate privileges. Attackers can insert a malicious executable file in the unquoted service path and trigger privilege escalation when the service restarts or the system reboots, executing code with LocalSystem privileges.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-428
Published	2026-04-04
Last modified	2026-07-21

Publisher (CNA): VulnCheck · Vendor: iobit

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-04 14:16 UTCPublished CVE record published
2026-07-21 07:10 UTCUpdated Record last modified

iobit malware fighter UPGRADE

Affected: <= 4.3.1

Fixed in: newer than 4.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy malware-fighter || rpm -q malware-fighter || malware-fighter --version

2. UPGRADE to newer than 4.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade malware-fighter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade malware-fighter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2016-20059?

malware fighter: upgrade to newer than 4.3.1. Exact commands for each OS are on this page.

Is CVE-2016-20059 being exploited?

CVE-2016-20059 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-2016-20059 affect?

CVE-2016-20059 affects malware fighter. Severity is high (CVSS 7.8). IObit Malware Fighter 4.3.1 contains an unquoted service path vulnerability in the IMFservice and LiveUpdateSvc services that allows local attackers to escalate privileges. Attackers can insert a malicious executable file in the unquoted se

How urgent is CVE-2016-20059?

Priority 34/100. High severity; Public exploit reference

References

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