---
title: "CVE-2008-4128: Cisco IOS Cross-Site Request Forgery Vulnerability"
url: https://erroneo.us/security/cve/CVE-2008-4128/
description: "CVE-2008-4128 (Cisco IOS): Exploited in the wild (CISA KEV). Multiple cross-site request forgery (CSRF) vulnerabilities in the HTTP Administration component…"
type: vulnerability-record
section: "Security Digest"
date_published: 2008-09-18
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2008-4128"
kev: true
cvss: 8.1
epss: 0.33871
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Cisco IOS. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-07-13, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-07-16 ; treat that as the outer limit, not the target.
- EPSS 33.9% , percentile 98: FIRST’s model estimates a 33.9% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Editorial verdict: Check exposure. Cisco IOS CVE-2008-4128: 18-Year-Old CSRF in CISA KEV — Only organizations still running retired IOS 12.4 routers are exposed, but a Russian state unit is using this bug; find those boxes, turn off their web server today and replace them.

## What it is

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 (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 8.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: added 2026-07-13; federal due date 2026-07-16. Known ransomware use: Unknown.
- CISA required action: 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 33.87% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [cisco.com](https://www.cisco.com/c/en/us/obsolete/ios-nx-os-software/cisco-ios-software-releases-12-4-mainline.html)
- [CVE.org record CVE-2008-4128](https://www.cve.org/CVERecord?id=CVE-2008-4128)
- [NVD entry CVE-2008-4128](https://nvd.nist.gov/vuln/detail/CVE-2008-4128)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2008-4128)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)
- [6476](https://www.exploit-db.com/exploits/6476)
- [cisco-router-csrf(45226)](https://exchange.xforce.ibmcloud.com/vulnerabilities/45226)
- [jbrownsec.blogspot.com](http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.html)
- [6477](https://www.exploit-db.com/exploits/6477)
- [31218](http://www.securityfocus.com/bid/31218)
- [media.defense.gov](https://media.defense.gov/2026/Jul/09/2003959498/-1/-1/1/CSA_IMPROVE_ROUTER_HYGIENE.PDF)

---
Source page: https://erroneo.us/security/cve/CVE-2008-4128/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt