CVE-2015-0640: Cisco IOS XE

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

The high-speed logging (HSL) feature in Cisco IOS XE 2.x and 3.x before 3.10.4S, 3.11 before 3.11.3S, 3.12 before 3.12.1S, 3.13 before 3.13.0S, 3.14 before 3.14.0S, and 3.15 before 3.15.0S allows remote attackers to cause a denial of service (device reload) via large IP packets that require NAT and HSL processing after fragmentation, aka Bug ID CSCuo25741.

Affected products

• Cisco IOS XE: version 3.1s.0 only; version 3.1s.1 only; version 3.1s.2 only; version 3.1s.3 only; version 3.1s.4 only; version 3.1s.5 only; …

Published 2015-03-26. Last modified 2026-06-17.