CVE-2013-6686: The SSL VPN implementation in Cisco IOS 15.3(1)T2 and earlier allows remote authenticated users to cause a...

Security readout for executives and security teams

This flaw could let an authenticated SSL VPN user crash or stall service on affected Cisco IOS devices by sending crafted DTLS traffic within a VPN session. The business impact is availability: remote access or network services may be disrupted. The source bundle does not provide CVSS scoring, confirmed exploitation, or specific fixed releases. Exposure is most likely on legacy Cisco IOS deployments running SSL VPN on 15.3(1)T2 or earlier. Internet-facing or broadly accessible VPN portals increase operational risk, but exploitation requires an authenticated SSL VPN user according to the CVE description. Schedule remediation after confirming affected legacy Cisco IOS SSL VPN exposure. Prioritize critical VPN gateways because the impact is service disruption, but urgency is reduced by the authenticated prerequisite and lack of cited active exploitation. Mitigation focus: Review Cisco advisory for fixed releases, workarounds, and platform-specific applicability.; Inventory Cisco IOS SSL VPN devices running 15.3(1)T2 or earlier.; Prioritize Cisco-directed remediation for externally reachable or business-critical VPN endpoints..

Prepared

Jun 14, 2026, 15:13 UTC (UTC+00:00)

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