CVE-2009-4911: Unspecified vulnerability on Cisco Adaptive Security Appliances (ASA) 5580 series devices with software bef...

Security readout for executives and security teams

This CVE describes a remote denial-of-service issue in Cisco ASA 5580 appliances running software before 8.1(2). Successful triggering can crash the security appliance, disrupting firewall or SSL VPN availability. Public details are sparse, and no KEV listing or provided source indicates active exploitation. Exposure is likely limited to organizations still operating Cisco ASA 5580 series devices on software before 8.1(2), especially where SSL VPN or PPPoE-related functionality is reachable. Treat this as a resilience risk for legacy perimeter infrastructure. Prioritize if affected ASA 5580 devices support business-critical VPN or firewall paths, because a crash can interrupt access and network operations. Mitigation focus: Identify any Cisco ASA 5580 appliances still in service.; Check whether software is older than 8.1(2).; Review Cisco ASA 8.1(2) release notes for the fixed-version guidance..

Prepared

Jun 28, 2026, 02:01 UTC (UTC+00:00)

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