CVE-2007-3681: Winpcap

Medium severity, CVSS 6.6. EPSS: 2.4% chance of exploitation in the next 30 days.

The IOCTL 9031 (BIOCGSTATS) handler in the NPF.SYS device driver in WinPcap before 4.0.1 allows local users to overwrite memory and execute arbitrary code via malformed Interrupt Request Packet (Irp) parameters.

Affected products

• Winpcap Winpcap: version 3.1 only; version 4.0 only

Published 2007-07-11. Last modified 2026-06-16.