CVE-2002-0601: Information Security Systems Realsecure Network Sensor

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

ISS RealSecure Network Sensor 5.x through 6.5 allows remote attackers to cause a denial of service (crash) via malformed DHCP packets that cause RealSecure to dereference a null pointer.

Affected products

• Information Security Systems Realsecure Network Sensor: version 5.0_xpu_3.4 only; version 5.5.1_xpu_3.4 only; version 5.5.2_xpu_3.4 only; version 5.5_xpu_3.4 only; version 6.0_xpu_3.4 only; version 6.5 only

Published 2002-06-18. Last modified 2026-06-16.