CVE-2019-1750: Cisco IOS XE

High severity, CVSS 7.4. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability in the Easy Virtual Switching System (VSS) of Cisco IOS XE Software on Catalyst 4500 Series Switches could allow an unauthenticated, adjacent attacker to cause the switches to reload. The vulnerability is due to incomplete error handling when processing Cisco Discovery Protocol (CDP) packets used with the Easy Virtual Switching System. An attacker could exploit this vulnerability by sending a specially crafted CDP packet. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Affected products

• Cisco IOS XE: version 3.6.0ae only; version 3.6.0be only; version 3.6.0e only; version 3.6.1e only; version 3.6.2ae only; version 3.6.2e only; …

Published 2019-03-28. Last modified 2026-06-17.