CVE-2024-20257: Cisco Asyncos

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an authenticated, remote attacker to conduct an XSS attack against a user of the interface.r This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Affected products

• Cisco Asyncos: version 11.0.3-238 only; version 11.1.0-069 only; version 11.1.0-128 only; version 11.1.0-131 only; version 12.0.0-419 only; version 12.1.0-071 only; …

Published 2024-05-15. Last modified 2026-06-17.