CVE-2013-5544: The VPN authentication functionality in Cisco Adaptive Security Appliance (ASA) Software allows remote atta...

Security readout for executives and security teams

CVE-2013-5544 describes a denial-of-service issue in Cisco ASA Software VPN authentication. A remote attacker could trigger a device reload by sending many username-from-cert IKE requests. The available bundle does not provide CVSS, affected versions, or confirmed fixes. Organizations may be exposed if they run Cisco ASA Software with VPN authentication reachable by untrusted networks. The bundle does not list specific affected versions or configurations, so exposure requires checking Cisco guidance and local ASA inventories. Treat this as a targeted availability risk for Cisco ASA VPN services. Prioritize confirmation for internet-facing ASA VPN deployments, especially where VPN downtime would interrupt business operations. Mitigation focus: Review Cisco security notice CVE-2013-5544 for affected releases and official remediation.; Inventory Cisco ASA appliances providing VPN authentication or IKE services.; If affected, apply Cisco-supported fixed software or workaround from vendor guidance..

Prepared

Jun 14, 2026, 15:32 UTC (UTC+00:00)

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