CVE-2006-3942: Microsoft Windows 2000

High severity, CVSS 7.8. EPSS: 75% chance of exploitation in the next 30 days.

The server driver (srv.sys) in Microsoft Windows NT 4.0, 2000, XP, and Server 2003 allows remote attackers to cause a denial of service (system crash) via an SMB_COM_TRANSACTION SMB message that contains a string without null character termination, which leads to a NULL dereference in the ExecuteTransaction function, possibly related to an "SMB PIPE," aka the "Mailslot DOS" vulnerability. NOTE: the name "Mailslot DOS" was derived from incomplete initial research; the vulnerability is not associated with a mailslot.

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows 2003 Server: version 64-bit only; version itanium only; version r2 only; version sp1 only
• Microsoft Windows XP: any version

Published 2006-07-31. Last modified 2026-06-16.