CVE-2002-0823

CVE-2002-0823 is a high-severity vulnerability in Microsoft Windows Help with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 44% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Buffer overflow in Winhlp32.exe allows remote attackers to execute arbitrary code via an HTML document that calls the HTML Help ActiveX control (HHCtrl.ocx) with a long pathname in the Item parameter.

Frequently asked questions

What is CVE-2002-0823?
Buffer overflow in Winhlp32.exe allows remote attackers to execute arbitrary code via an HTML document that calls the HTML Help ActiveX control (HHCtrl.ocx) with a long pathname in the Item parameter.
How severe is CVE-2002-0823?
CVE-2002-0823 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2002-0823 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 44% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0823?
CVE-2002-0823 primarily affects Microsoft Windows Help. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0823?
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-2002-0823 published?
CVE-2002-0823 was published on 2002-08-12 and last updated on 2026-06-16.

References

Affected products (3)