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

Cisco IOS · in CISA KEV since 2026-07-13

2026-07-13added to KEV

2026-07-16federal remediation due date

33.92%EPSS exploit probability (30 days) 98.3th percentile

8.1 HIGHCVSS 3.1

Unknownknown ransomware use

6,507days from NVD publication to KEV

What it is

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.

Required action (CISA)

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.

CWE	CWE-352
CVSS vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`
NVD published	2008-09-18 (Modified)

Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2008-4128.json · all KEV CVEs

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