CVE-2002-1973: Microsoft Foundation Class Library

High severity, CVSS 7.5. EPSS: 40% chance of exploitation in the next 30 days.

Buffer overflow in CHttpServer::OnParseError in the ISAPI extension (Isapi.cpp) when built using Microsoft Foundation Class (MFC) static libraries in Visual C++ 5.0, and 6.0 before SP3, as used in multiple products including BadBlue, allows remote attackers to cause a denial of service (access violation and crash) and possibly execute arbitrary code via a long query string that causes a parsing error.

Affected products

• Microsoft Foundation Class Library: version 7.0 only
• Working Resources Inc. Badblue: version personal_1.7.3 only

Published 2002-12-31. Last modified 2026-06-16.