CVE-2016-1481: Cisco Email Security Appliance

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.Affected Products: This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for Cisco Email Security Appliances, both virtual and hardware appliances, if the software is configured to apply a message filter that contains certain rules. More Information: CSCux59873. Known Affected Releases: 8.5.6-106 9.1.0-032 9.7.0-125. Known Fixed Releases: 9.1.1-038 9.7.1-066.

Affected products

• Cisco Email Security Appliance: version 8.5.0-000 only; version 8.5.0-er1-198 only; version 8.5.6-052 only; version 8.5.6-073 only; version 8.5.6-074 only; version 8.5.6-106 only; …

Published 2016-10-28. Last modified 2026-06-17.