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

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: yes — in CISA KEV since 2026-07-13
EPSS: 33.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2008-09-18 · updated 2026-09-24
Weakness: CWE-352

Description

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: 12.4

References

http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.html
http://www.securityfocus.com/bid/31218
https://exchange.xforce.ibmcloud.com/vulnerabilities/45226
https://www.exploit-db.com/exploits/6476
https://www.exploit-db.com/exploits/6477
http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.html
http://www.securityfocus.com/bid/31218
https://exchange.xforce.ibmcloud.com/vulnerabilities/45226
https://www.exploit-db.com/exploits/6476
https://www.exploit-db.com/exploits/6477
https://media.defense.gov/2026/Jul/09/2003959498/-1/-1/1/CSA_IMPROVE_ROUTER_HYGIENE.PDF
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2008-4128

Get alerted when CVE-2008-4128 or the next vulnerability affects your stack