CVE-2020-3264: Cisco SD-WAN Firmware

High severity, CVSS 7.1. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability in Cisco SD-WAN Solution software could allow an authenticated, local attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access and make changes to the system that they are not authorized to make.

Affected products

• Cisco SD-WAN Firmware: before 18.4.5 (fixed in 18.4.5); from 19.2.0, before 19.2.2 (fixed in 19.2.2); version 20.1.0 only; version 20.3.0 only

Published 2020-03-19. Last modified 2026-06-17.