CVE-2018-0470: Cisco IOS XE

High severity, CVSS 8.6. EPSS: 4.4% chance of exploitation in the next 30 days.

A vulnerability in the web framework of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a buffer overflow condition on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the affected software improperly parsing malformed HTTP packets that are destined to a device. An attacker could exploit this vulnerability by sending a malformed HTTP packet to an affected device for processing. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected device, resulting in a DoS condition.

Affected products

• Cisco IOS XE: version 16.2.0 only; version 16.3(1) only

Published 2018-10-05. Last modified 2026-06-17.