CVE-2008-4128: Cisco IOS Cross-Site Request Forgery Vulnerability

High severity, CVSS 8.1. Actively exploited: in CISA KEV since 2026-07-13. EPSS: 33.9% chance of exploitation in the next 30 days.

Multiple cross-site request forgery (CSRF) vulnerabilities in the HTTP Administration component in Cisco IOS 12.4 on the 871 Integrated Services Router allow remote attackers to execute arbitrary commands via (1) a certain "show privilege" command to the /level/15/exec/- URI, and (2) a certain "alias exec" command to the /level/15/exec/-/configure/http URI. NOTE: some of these details are obtained from third party information.

Affected products

• Cisco IOS: version 12.4 only

Published 2008-09-18. Last modified 2026-09-24.