Unrated severityCISA KEVNVD Advisory· Published Dec 17, 2025· Updated Feb 26, 2026
Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability
CVE-2025-20393
Description
A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.
This vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges.
Affected products
2- Cisco/Cisco Secure Emailv5Range: 14.0.0-698
- Cisco/Cisco Secure Email and Web Managerv5Range: 13.6.2-023
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
1- IR Trends Q1 2026: Phishing reemerges as top initial access vector, as attacks targeting public administration persistCisco Talos Intelligence · Apr 22, 2026