CVE-2015-6359: Cisco IOS

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS 15.3(3)S0.1 on ASR devices mishandles internal tables, which allows remote attackers to cause a denial of service (memory consumption or device crash) via a flood of crafted ND messages, aka Bug ID CSCup28217.

Affected products

• Cisco IOS: version 15.2(4)e only; version 15.2(4)pi only; version 15.2(4)st only; version 15.2(5)st only; version 15.3(3)s0.1 only

Published 2015-12-15. Last modified 2026-06-17.