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

criticalknown exploitedpublic exploitCVE-2008-4128
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Ciscoproduct: IOSCross-site request forgeryaffected: 12.4
What
Cisco IOS 12.4 has cross-site request forgery vulnerabilities allowing remote command execution.
Who is affected
Deployments of Cisco IOS 12.4 are affected.
Urgency
Remediation is urgent as the vulnerabilities are actively exploited and classified as critical.
Action
Apply patches to Cisco IOS 12.4 to mitigate the vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-07-13
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2008-4128

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2008-4128coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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