CVE-2016-6467: Cisco Asr 5000 Series Software

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

A vulnerability in IPv6 packet fragment reassembly of StarOS for Cisco Aggregation Services Router (ASR) 5000 Series Switch could allow an unauthenticated, remote attacker to cause an unexpected reload of the Network Processing Unit (NPU) process. More Information: CSCva84552. Known Affected Releases: 20.0.0 21.0.0 21.0.M0.64702. Known Fixed Releases: 21.0.0 21.0.0.65256 21.0.M0.64970 21.0.V0.65150 21.1.A0.64973 21.1.PP0.65270 21.1.R0.65130 21.1.R0.65135 21.1.VC0.65203.

Affected products

• Cisco Asr 5000 Series Software: version 20.0.0 only; version 21.0.0 only; version 21.0.m0.64702 only

Published 2016-12-14. Last modified 2026-06-17.