CVE-2018-16189: Untrusted search path vulnerability in Self-Extracting Archives created by UNLHA32.DLL prior to Ver 3.00 allow

Q: How do I fix CVE-2018-16189?

unlha32.dll: upgrade to 3.00. Exact commands for each OS are on this page.

Q: Is CVE-2018-16189 being exploited?

CVE-2018-16189 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-2018-16189 affect?

CVE-2018-16189 affects unlha32.dll. Severity is high (CVSS 7.8). Untrusted search path vulnerability in Self-Extracting Archives created by UNLHA32.DLL prior to Ver 3.00 allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

This month

HIGH 7.8UPGRADE

CVE-2018-16189 is a high-severity flaw (CVSS 7.8) affecting unlha32.dll. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Untrusted search path vulnerability in Self-Extracting Archives created by UNLHA32.DLL prior to Ver 3.00 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 unlha32.dll UPGRADE

Affected: < 3.00

Fixed in: 3.00

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 3.00 (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-2018-16189?

unlha32.dll: upgrade to 3.00. Exact commands for each OS are on this page.

Is CVE-2018-16189 being exploited?

CVE-2018-16189 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-2018-16189 affect?

CVE-2018-16189 affects unlha32.dll. Severity is high (CVSS 7.8). Untrusted search path vulnerability in Self-Extracting Archives created by UNLHA32.DLL prior to Ver 3.00 allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

How urgent is CVE-2018-16189?

Priority 43/100. High severity

Related CVEs

CVE-2019-5911 HIGH 7.8 UPGRADE Untrusted search path vulnerability in the installer of UNLHA32.DLL (UNLHA32.DLL for Win32 Ver 2.67.1.2 and ea
CVE-2018-16190 HIGH 7.8 UPGRADE UPGRADE Untrusted search path vulnerability in UNARJ32.DLL for Win32, LHMelting for Win32, and LMLzh32.DLL (UNARJ32.DL

References

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