CVE-2020-3370: Cisco Email Security Appliance

Medium severity, CVSS 5.8. EPSS: 1.3% chance of exploitation in the next 30 days.

A vulnerability in URL filtering of Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to bypass URL filtering on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted, malicious HTTP request to an affected device. A successful exploit could allow the attacker to redirect users to malicious sites.

Affected products

• Cisco Email Security Appliance: before 13.0.1 (fixed in 13.0.1); from 13.5.0, before 13.5.1 (fixed in 13.5.1)

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