CVE-2016-1426: Cisco IOS XR

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco IOS XR 5.x through 5.2.5 on NCS 6000 devices allows remote attackers to cause a denial of service (timer consumption and Route Processor reload) via crafted SSH traffic, aka Bug ID CSCux76819.

Affected products

• Cisco IOS XR: version 5.0.0 only; version 5.0.1 only; version 5.0_base only; version 5.1.0 only; version 5.1.1 only; version 5.1.1.k9sec only; …

Published 2016-07-15. Last modified 2026-06-17.