CVE-2019-1672: Cisco Web Security Appliance

Medium severity, CVSS 5.8. EPSS: 1.6% chance of exploitation in the next 30 days.

A vulnerability in the Decryption Policy Default Action functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The vulnerability is due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. An attacker could exploit this vulnerability by sending a SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured drop policy to block specific SSL connections. Releases 10.1.x and 10.5.x are affected.

Affected products

• Cisco Web Security Appliance: version 10.1.0-204 only; version 10.5.2-072 only; version 11.5.1-fcs-115 only

Published 2019-02-08. Last modified 2026-06-17.