CVE-2009-4912: Cisco ASA 5580

High severity, CVSS 10.0. EPSS: 2.5% chance of exploitation in the next 30 days.

Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) complete an SSL handshake with an HTTPS client even if this client is unauthorized, which might allow remote attackers to bypass intended access restrictions via an HTTPS session, aka Bug ID CSCso10876.

Affected products

• Cisco ASA 5580: up to and including 8.1\(1\)

Published 2010-06-29. Last modified 2026-06-16.