CVE-2005-3921: Cisco IOS

Low severity, CVSS 2.6. EPSS: 2.8% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in Cisco IOS Web Server for IOS 12.0(2a) allows remote attackers to inject arbitrary web script or HTML by (1) packets containing HTML that an administrator views via an HTTP interface to the contents of memory buffers, as demonstrated by the URI /level/15/exec/-/buffers/assigned/dump; or (2) sending the router Cisco Discovery Protocol (CDP) packets with HTML payload that an administrator views via the CDP status pages. NOTE: these vectors were originally reported as being associated with the dump and packet options in /level/15/exec/-/show/buffers.

Affected products

• Cisco IOS: up to and including 12.3; version 12.3(1a) only; version 12.3(2)ja only; version 12.3(2)ja5 only; version 12.3(2)jk only; version 12.3(2)jk1 only; …

Published 2005-11-30. Last modified 2026-06-16.