CVE-2007-3873: Trend Micro Antispyware

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Stack-based buffer overflow in vstlib32.dll 1.2.0.1012 in the SSAPI Engine 5.0.0.1066 through 5.2.0.1012 in Trend Micro AntiSpyware 3.5 and PC-Cillin Internet Security 2007 15.0 through 15.3, when the Venus Spy Trap (VST) feature is enabled, allows local users to cause a denial of service (service crash) or execute arbitrary code via a file with a long pathname, which triggers the overflow during a ReadDirectoryChangesW callback notification.

Affected products

• Trend Micro Antispyware: version 3.5 only
• Trend Micro Pc-Cillin Internet Security 2007: version 15.0 only; version 15.2 only; version 15.2_patch only; version 15.3 only

Published 2007-08-22. Last modified 2026-06-16.