CVE-2021-1516: Cisco Content Security Management Appliance

Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Content Security Management Appliance (SMA), Cisco Email Security Appliance (ESA), and Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to access sensitive information on an affected device. The vulnerability exists because confidential information is included in HTTP requests that are exchanged between the user and the device. An attacker could exploit this vulnerability by looking at the raw HTTP requests that are sent to the interface. A successful exploit could allow the attacker to obtain some of the passwords that are configured throughout the interface.

Affected products

• Cisco Content Security Management Appliance: affected versions not specified
• Cisco Email Security Appliance: affected versions not specified
• Cisco Ironport Web Security Appliance: version 13.6.2-023 only; version 14.0.0-090 only; version 14.0.0-133 only; version 14.0.0-292 only; version 14.0.0-300 only
• Cisco Web Security Appliance: affected versions not specified

Published 2021-05-06. Last modified 2026-06-17.