CVE-2006-4138

CVE-2006-4138 is a high-severity vulnerability in Microsoft Help File Viewer with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Multiple unspecified vulnerabilities in Microsoft Windows Help File viewer (winhlp32.exe) allow user-assisted attackers to execute arbitrary code via crafted HLP files.

Frequently asked questions

What is CVE-2006-4138?
Multiple unspecified vulnerabilities in Microsoft Windows Help File viewer (winhlp32.exe) allow user-assisted attackers to execute arbitrary code via crafted HLP files.
How severe is CVE-2006-4138?
CVE-2006-4138 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2006-4138 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4138?
CVE-2006-4138 affects Microsoft Help File Viewer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-4138?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-4138 published?
CVE-2006-4138 was published on 2006-08-14 and last updated on 2026-06-16.

References

Affected products (1)