CVE-2012-5032: Cisco IOS

Medium severity, CVSS 6.4. EPSS: 1.3% chance of exploitation in the next 30 days.

The Flex-VPN load-balancing feature in the ipsec-ikev2 implementation in Cisco IOS before 15.1(1)SY3 does not require authentication, which allows remote attackers to trigger the forwarding of VPN traffic to an attacker-controlled destination, or the discarding of this traffic, by arranging for an arbitrary device to become a cluster member, aka Bug ID CSCub93641.

Affected products

• Cisco IOS: up to and including 15.1\(1\)sy2; version 15.1 only; version 15.1(1)sy only; version 15.1(1)sy1 only

Published 2014-04-23. Last modified 2026-06-16.