erroneo.us
Search all guides⌘K

Security Digest · Vulnerability record · Known exploited

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

Exploited in the wild (CISA KEV). 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)…

CISA KEV · added 2026-07-13 CVSS 8.1 High EPSS 33.9% · p98 Check exposure

Updated By erroneo.us Security Desk12 references Seen in the digest for Jul 13, 2026

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

  • 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.

CISA’s summary

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.

Weakness type: CWE-352.

Product: Cisco IOS · Assigned by: mitre · Published: 2008-09-18

Affected and fixed versions

VendorProductAffected versions (per CVE record)
n/an/asee vendor advisory

Severity scores

Scored byCVSSScoreVector
CISA-ADP3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  • Attack vector: network (remotely reachable)
  • Attack complexity: low
  • Privileges required: none (no login)
  • User interaction: required (a user must click/open something)
  • Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

  • 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.

Timeline

  • — CVE record published by mitre
  • — Added to CISA’s Known Exploited Vulnerabilities catalog
  • — erroneo.us brief: Cisco IOS CVE-2008-4128: 18-Year-Old CSRF in CISA KEV
  • — CISA remediation deadline for US federal agencies
  • — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

  1. cisco.com cisco.com

Vulnerability records

  1. CVE.org record CVE-2008-4128 cve.org
  2. NVD entry CVE-2008-4128 nvd.nist.gov

Government

  1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov
  2. Listed in CISA KEV notes (cisa.gov) cisa.gov
  3. Listed in CISA KEV notes (cisa.gov) cisa.gov

Other references from the CVE record and advisory

  1. 6476 exploit-db.com
  2. cisco-router-csrf(45226) exchange.xforce.ibmcloud.com
  3. jbrownsec.blogspot.com jbrownsec.blogspot.com
  4. 6477 exploit-db.com
  5. 31218 securityfocus.com
  6. media.defense.gov media.defense.gov

All exploited Cisco vulnerabilities · Today’s Security Digest