CVE-2008-4128
Cisco IOS Cross-Site Request Forgery Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-07-13. Federal due date: 2026-07-16.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- Cisco Router - HTTP Administration Cross-Site Request Forgery / Command Execution (1)2008-09-17 · remote · hardware · Verified
Impact
Cisco IOS 12.4 contains multiple cross-site forgery vulnerabilities that allows 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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Ios | Version 12.4 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- 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
- https://www.cisco.com/c/en/us/obsolete/ios-nx-os-software/cisco-ios-software-releases-12-4-mainline.html