CVE-2018-16190: Untrusted search path vulnerability in UNARJ32.DLL for Win32, LHMelting for Win32, and LMLzh32.DLL (UNARJ32.DL

Q: How do I fix CVE-2018-16190?

lhmelting: upgrade to newer than 1.65.3.6; lmlzh32.dll: upgrade to newer than 2.67.1.2; unarj32.dll: upgrade to newer than 1.10.1.25. Exact commands for each OS are on this page.

Q: Is CVE-2018-16190 being exploited?

CVE-2018-16190 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-2018-16190 affect?

CVE-2018-16190 affects lhmelting, lmlzh32.dll, unarj32.dll. Severity is high (CVSS 7.8). Untrusted search path vulnerability in UNARJ32.DLL for Win32, LHMelting for Win32, and LMLzh32.DLL (UNARJ32.DLL for Win32 Ver 1.10.1.25 and earlier, LHMelting for Win32 Ver 1.65.3.6 and earlier, LMLzh32.DLL Ver 2.67.1.2 and earlier) allows

This month

HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2018-16190 is a high-severity flaw (CVSS 7.8) affecting lhmelting, lmlzh32.dll, unarj32.dll. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Untrusted search path vulnerability in UNARJ32.DLL for Win32, LHMelting for Win32, and LMLzh32.DLL (UNARJ32.DLL for Win32 Ver 1.10.1.25 and earlier, LHMelting for Win32 Ver 1.65.3.6 and earlier, LMLzh32.DLL Ver 2.67.1.2 and earlier) allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-426
Published	2019-02-13
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: micco

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

Am I affected?

Timeline

2019-02-13 18:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

micco lhmelting UPGRADE

Affected: <= 1.65.3.6

Fixed in: newer than 1.65.3.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lhmelting || rpm -q lhmelting || lhmelting --version

2. UPGRADE to newer than 1.65.3.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lhmelting

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lhmelting

Note

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

micco lmlzh32.dll UPGRADE

Affected: <= 2.67.1.2

Fixed in: newer than 2.67.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lmlzh32.dll || rpm -q lmlzh32.dll || lmlzh32.dll --version

2. UPGRADE to newer than 2.67.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lmlzh32.dll

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lmlzh32.dll

Note

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

micco unarj32.dll UPGRADE

Affected: <= 1.10.1.25

Fixed in: newer than 1.10.1.25

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy unarj32.dll || rpm -q unarj32.dll || unarj32.dll --version

2. UPGRADE to newer than 1.10.1.25 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade unarj32.dll

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade unarj32.dll

Note

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

micco unlha32.dll UPGRADE

Affected: <= 2.67.1.2

Fixed in: newer than 2.67.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy unlha32.dll || rpm -q unlha32.dll || unlha32.dll --version

2. UPGRADE to newer than 2.67.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade unlha32.dll

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade unlha32.dll

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-2018-16190?

lhmelting: upgrade to newer than 1.65.3.6; lmlzh32.dll: upgrade to newer than 2.67.1.2; unarj32.dll: upgrade to newer than 1.10.1.25. Exact commands for each OS are on this page.

Is CVE-2018-16190 being exploited?

CVE-2018-16190 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-2018-16190 affect?

CVE-2018-16190 affects lhmelting, lmlzh32.dll, unarj32.dll. Severity is high (CVSS 7.8). Untrusted search path vulnerability in UNARJ32.DLL for Win32, LHMelting for Win32, and LMLzh32.DLL (UNARJ32.DLL for Win32 Ver 1.10.1.25 and earlier, LHMelting for Win32 Ver 1.65.3.6 and earlier, LMLzh32.DLL Ver 2.67.1.2 and earlier) allows

How urgent is CVE-2018-16190?

Priority 42/100. High severity

Related CVEs

CVE-2019-5913 HIGH 7.8 UPGRADE Untrusted search path vulnerability in the installer of LHMelting (LHMelting for Win32 Ver 1.65.3.6 and earlie

References

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