CVE-2016-6465: Cisco Email Security Appliance

Medium severity, CVSS 4.3. EPSS: 1.6% chance of exploitation in the next 30 days.

A vulnerability in the content filtering functionality of Cisco AsyncOS Software for Cisco Email Security Appliances and Cisco Web Security Appliances could allow an unauthenticated, remote attacker to bypass user filters that are configured for an affected device. Affected Products: This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for both virtual and hardware versions of the following Cisco products: Cisco Email Security Appliances (ESAs) that are configured to use message or content filters that scan incoming email attachments; Cisco Web Security Appliances (WSAs) that are configured to use services that scan accessed web content. More Information: CSCva90076, CSCvb06764. Known Affected Releases: 10.0.0-125 8.5.7-042 9.7.2-047.

Affected products

• Cisco Email Security Appliance: version 8.5.7-042 only; version 9.7.2-047 only; version 10.0.0-125 only; version 10.0.0-232 only

Published 2016-12-14. Last modified 2026-06-17.