CVE-2011-0963: Cisco Nac Guest Server

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

The default configuration of the RADIUS authentication feature on the Cisco Network Admission Control (NAC) Guest Server with software before 2.0.3 allows remote attackers to bypass intended access restrictions and obtain network connectivity via unspecified vectors, aka Bug ID CSCtj66922.

Affected products

• Cisco Nac Guest Server
• Cisco Nac Guest Server Software: up to and including 2.0.2; version 1.0.0 only; version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; …

Published 2011-03-31. Last modified 2026-06-16.