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Unrated severityNVD Advisory· Published Sep 27, 2013· Updated Jun 16, 2026

CVE-2013-5476

CVE-2013-5476

Description

The Zone-Based Firewall (ZFW) feature in Cisco IOS 15.1 through 15.2, when content filtering or HTTP ALG inspection is enabled, allows remote attackers to cause a denial of service (device reload or hang) via crafted IPv4 HTTP traffic, aka Bug ID CSCtx56174.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Cisco Systems, Inc./Cisco iOS3 versions
    cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2:*:*:*:*:*:*:*
    • (no CPE)range: 15.1 through 15.2

Patches

Vulnerability mechanics

References

1

News mentions

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