CVE-2015-6327: Cisco Adaptive Security Appliance Software

High severity, CVSS 7.8. EPSS: 2.2% chance of exploitation in the next 30 days.

The IKEv1 implementation in Cisco Adaptive Security Appliance (ASA) software 7.2 and 8.2 before 8.2(5.58), 8.3 and 8.4 before 8.4(7.29), 8.5 through 8.7 before 8.7(1.17), 9.0 before 9.0(4.37), 9.1 before 9.1(6.8), 9.2 before 9.2(4), and 9.3 before 9.3(3) allows remote attackers to cause a denial of service (device reload) via crafted ISAKMP UDP packets, aka Bug ID CSCus94026.

Affected products

• Cisco Adaptive Security Appliance Software: version 7.2.1 only; version 7.2.1.9 only; version 7.2.1.13 only; version 7.2.1.19 only; version 7.2.1.24 only; version 7.2.2 only; …

Published 2015-10-25. Last modified 2026-06-17.