CVE-2020-3369: Cisco SD-WAN Firmware

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

A vulnerability in the deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper processing of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP packets through an affected device. A successful exploit could allow the attacker to make the device reboot continuously, causing a DoS condition.

Affected products

• Cisco SD-WAN Firmware: version 19.2.0 only; version 19.2.1 only; version 19.2.097 only; version 19.2.098 only
• Cisco Vedge Cloud Router: affected versions not specified

Published 2020-07-16. Last modified 2026-06-17.