CVE-2017-6671: Cisco Email Security Appliance Firmware

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

A vulnerability in the email message scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured filters on the device, as demonstrated by the Attachment Filter. More Information: CSCvd34632. Known Affected Releases: 10.0.1-087 9.7.1-066. Known Fixed Releases: 10.0.2-020 9.8.1-015.

Affected products

• Cisco Email Security Appliance Firmware: version 9.7.1-066 only; version 10.0.1-087 only

Published 2017-06-13. Last modified 2026-06-17.