Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2008-4128

IOS

Cisco / IOS

Watch CVE-2008-4128 Browse KEV feed
Severity
CVSS 8.1 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
33.9%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2008-4128 is an unauthenticated vulnerability affecting Cisco IOS. Multiple cross-site request forgery (CSRF) vulnerabilities in the HTTP Administration component in Cisco IOS 12.4 on the 871 Integrated Services...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Cisco / IOS.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

IOS

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.

Published
18 Sep 2008
Exploitation Reported
13 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
Required

Tags

ios edge cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2008-4128
  • 6476 exploit-db.com · Exploit https://www.exploit-db.com/exploits/6476
  • 6477 exploit-db.com · Exploit https://www.exploit-db.com/exploits/6477
  • cisco-router-csrf(45226) exchange.xforce.ibmcloud.com · VDB Entry https://exchange.xforce.ibmcloud.com/vulnerabilities/45226
  • 31218 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/31218
  • jbrownsec.blogspot.com/2008/09/cisco-0day-released.html jbrownsec.blogspot.com · CVE Record http://jbrownsec.blogspot.com/2008/09/cisco-0day-released.html

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 13 Jul 2026

A trusted third party reported exploitation.

Proof of concept available

CVE

Recorded 23 Sep 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2026-07-13 17:00 UTC
CVE 2026-07-13 18:01 UTC
All CISA Advisories 2026-07-13 18:20 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.1 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

33.9%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Cross-Site Request Forgery (CSRF) CWE-352

Recent mention · All CISA Advisories

CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2008-4128 Cisco IOS Cross-Site Request Forgery Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber...

Read full advisory

All CVSS Scores

CVSS v3.1 8.1 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v2.0 9.3 High

AV:N/AC:M/Au:N/C:C/I:C/A:C

All Mentions

Recent mention · All CISA Advisories

CISA Adds One Known Exploited Vulnerability to Catalog

All CISA Advisories · 13 Jul 2026

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2008-4128 Cisco IOS Cross-Site Request Forgery Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires...

Recent mention · All CISA Advisories

Improve Router Hygiene to Protect Against Russian State-Sponsored Targeting

All CISA Advisories · 13 Jul 2026

Russian Government-Sponsored Activity Targets Poorly Configured and Vulnerable Devices Across Critical Sectors Executive summary Russian Federal Security Service (FSB) Center 16 cyber actors continue to exploit poorly configured and vulnerable networking devices worldwide, opportunistically compromising multiple critical infrastructure sector networks. This joint Cybersecurity Advisory (CSA) builds on FBI’s Russian Government Cyber Actors Targeting Networking Devices, Critical Infrastructure Public Service Announcement of the decade-plus FSB Center 16 cyber activity by providing additional...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

6477

cve · Created Unknown

6476

cve · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 18:20 UTC

    Public PoC available

    Public proof-of-concept code published

  2. 18:20 UTC

    KEV confirmed by All CISA Advisories

    Exploitation attested by an external source

  3. 18:01 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  4. 17:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  5. 20:00 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2008-4128

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2008-4128",
  "confidence": "Confirmed",
  "cvss_score": 8.1,
  "cvss_estimated": false,
  "epss_score": 0.33871,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}