CVE-2013-1100: The HTTP server in Cisco IOS on Catalyst switches does not properly handle TCP socket events, which allows...

Security readout for executives and security teams

CVE-2013-1100 is a Cisco IOS HTTP server flaw on Catalyst switches. Crafted network packets to ports 80 or 443 can crash an affected device, causing a denial of service. The provided sources do not identify exact affected versions, CVSS severity, or confirmed active exploitation. Exposure is most likely where Cisco Catalyst switch management HTTP or HTTPS is enabled and reachable. Internet or broad internal reachability would raise operational risk, but affected versions are not specified in the provided sources. Treat as an availability risk for network infrastructure. Prioritize switches that support critical operations or expose management services beyond tightly controlled admin networks. Version impact and fixes require Cisco advisory confirmation. Mitigation focus: Review the Cisco security notice for affected releases and vendor remediation.; Inventory Catalyst switches running Cisco IOS with HTTP or HTTPS management enabled.; Restrict management access to trusted administration networks while confirming vendor guidance..

Prepared

Jun 24, 2026, 11:46 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.