Secure Email and Web
CVE-2025-20393: Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Cisco Secure Email 14.0 | See the advisory |
| Cisco Secure Email 13.5 | See the advisory |
| Cisco Secure Email 13.0 | See the advisory |
| Cisco Secure Email 14.2 | See the advisory |
| Cisco Secure Email 13.0 | See the advisory |
| Cisco Secure Email 13.5 | See the advisory |
| Cisco Secure Email 14.2 | See the advisory |
| Cisco Secure Email 14.3 | See the advisory |
| Cisco Secure Email 15.0 | See the advisory |
| Cisco Secure Email 15.0 | See the advisory |
| Cisco Secure Email 15.5 | See the advisory |
| Cisco Secure Email 15.5 | See the advisory |
| Cisco Secure Email 15.5 | See the advisory |
| Cisco Secure Email 16.0 | See the advisory |
| Cisco Secure Email 15.0 | See the advisory |
| Cisco Secure Email 16.0 | See the advisory |
| Cisco Secure Email 15.5 | See the advisory |
| Cisco Secure Email 16.0 | See the advisory |
| Cisco Secure Email and Web Manager 13.6 | See the advisory |
| Cisco Secure Email and Web Manager 13.6 | See the advisory |
| Cisco Secure Email and Web Manager 13.0 | See the advisory |
| Cisco Secure Email and Web Manager 13.0 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 14.0 | See the advisory |
| Cisco Secure Email and Web Manager 12.8 | See the advisory |
| Cisco Secure Email and Web Manager 14.1 | See the advisory |
| Cisco Secure Email and Web Manager 13.6 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 12.8 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 14.3 | See the advisory |
| Cisco Secure Email and Web Manager 15.0 | See the advisory |
| Cisco Secure Email and Web Manager 15.5 | See the advisory |
| Cisco Secure Email and Web Manager 15.5 | See the advisory |
| Cisco Secure Email and Web Manager 15.5 | See the advisory |
| Cisco Secure Email and Web Manager 16.0 | See the advisory |
| Cisco Secure Email and Web Manager 15.5 | See the advisory |
| Cisco Secure Email and Web Manager 16.0 | See the advisory |
| Cisco Secure Email and Web Manager 15.0 | See the advisory |
| Cisco Secure Email and Web Manager 16.0 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Exploitation
In December 2025, the Cisco Product Security Incident Response Team (PSIRT) became aware of potentially malicious activity that targets Cisco Secure Email Gateway and Cisco Secure Email and Web Manager appliances.
CISA lists this CVE as exploited in the wild since 17 Dec 2025.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.