CVE-2008-4128
Cisco IOS Cross-Site Request Forgery Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 July 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 33.92% probability · 98th percentile
- CISA KEV
- Listed 13 July 2026 · due 16 July 2026
- Weakness
- CWE-352
- Affected
- cisco/ios
- Source
- cve@mitre.org
CISA notes
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. https://www.cisco.com/c/en/us/obsolete/ios-nx-os-software/cisco-ios-software-releases-12-4-mainline.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2008-4128
References
- http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.htmlBroken Link
- http://www.securityfocus.com/bid/31218Broken Link, Exploit, Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45226Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/6476Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/6477Exploit, Third Party Advisory, VDB Entry
- http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.htmlBroken Link
- http://www.securityfocus.com/bid/31218Broken Link, Exploit, Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45226Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/6476Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/6477Exploit, Third Party Advisory, VDB Entry
- https://media.defense.gov/2026/Jul/09/2003959498/-1/-1/1/CSA_IMPROVE_ROUTER_HYGIENE.PDFThird Party Advisory, US Government Resource
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2008-4128US Government Resource
- https://www.cisco.com/c/en/us/obsolete/ios-nx-os-software/cisco-ios-software-releases-12-4-mainline.htmlProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.