Is CVE-2008-4128 being actively exploited?

Yes. CVE-2008-4128 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on July 13, 2026.

What is the CVSS score for CVE-2008-4128?

CVE-2008-4128 has a CVSS 3.1 base score of 8.1 (HIGH).

CVE-2008-4128

HIGH · CVSS 8.1CISA KEV: actively exploitedEPSS 33.9%EU EUVD: exploited

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.

Key facts

CVSS score: 8.1 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-352
EPSS score: 33.9% (98th percentile)
In CISA KEV: Yes, added July 13, 2026
In EU EUVD: Yes (EUVD-2008-4111)
Published: September 18, 2008
NVD last modified: September 24, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Cisco IOS Cross-Site Request Forgery Vulnerability

Added to the KEV catalog on July 13, 2026; federal remediation due July 16, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-4111 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on September 24, 2026.

View on the EU Vulnerability Database

Affected products

cisco / 871 integrated services router
cisco / ios

References

http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.html(Broken Link)
http://www.securityfocus.com/bid/31218(Exploit, Third Party Advisory, VDB Entry)
https://exchange.xforce.ibmcloud.com/vulnerabilities/45226(Third Party Advisory, VDB Entry)
https://media.defense.gov/2026/Jul/09/2003959498/-1/-1/1/CSA_IMPROVE_ROUTER_HYGIENE.PDF(Third Party Advisory, US Government Resource)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2008-4128(US Government Resource)
https://www.cisco.com/c/en/us/obsolete/ios-nx-os-software/cisco-ios-software-releases-12-4-mainline.html(Product)
https://www.exploit-db.com/exploits/6476(Exploit, Third Party Advisory, VDB Entry)
https://www.exploit-db.com/exploits/6477(Exploit, Third Party Advisory, VDB Entry)

Last updated September 26, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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