CVE-2007-2039: Cisco Wireless Lan Controller Software

Medium severity, CVSS 6.1. EPSS: 1.2% chance of exploitation in the next 30 days.

The Network Processing Unit (NPU) in the Cisco Wireless LAN Controller (WLC) before 3.2.171.5, 4.0.x before 4.0.206.0, and 4.1.x allows remote attackers on a local wireless network to cause a denial of service (loss of packet forwarding) via (1) crafted SNAP packets, (2) malformed 802.11 traffic, or (3) packets with certain header length values, aka Bug IDs CSCsg15901 and CSCsh10841.

Affected products

• Cisco Wireless Lan Controller Software: from 3.2, before 3.2.171.5 (fixed in 3.2.171.5); from 4.0, before 4.0.206.0 (fixed in 4.0.206.0); from 4.1, before 4.1.171.0 (fixed in 4.1.171.0)

Published 2007-04-16. Last modified 2026-06-16.