CVE-2008-4128

Cisco IOSActively Exploited (CISA KEV)CVSS 4.3KEV0-DayPoC

Actively exploited (CISA KEV) - patch before 2026-07-16

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.

Actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No distribution fix is listed yet; apply vendor mitigations and monitor.

Recommended action: No fix is published yet for an actively-exploited flaw. Apply vendor mitigations, restrict exposure, and watch for a patch.

CVE-2008-4128 Cisco IOS Actively Exploited (CISA KEV)

Severity metrics

CVSS 3.1 : 4.3 MEDIUM · CVSS 2.0 : 9.3 HIGH

Attack vectorNetwork (remote)

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

Confidentiality impactLow

Integrity impactNone

Availability impactNone

Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected & fixed versions by distribution

Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.

No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.

Sources

Advisory NVD CVE.org

Published 2026-07-13 · source: CISA Known Exploited Vulnerabilities