CVE-2025-20393
Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability
Severity
Critical 10
CVSS 3.1
Exploited
Yes — in CISA KEV
Added Dec 17, 2025
EPSS
0.295
98.0th percentile
Discovered by
Third party
Published by the vendor
Published
Dec 17, 2025
Assigned by cisco
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.
Weakness: CWE-20
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Email Gateway | Email Security | cna-assigner |
Vendor-reported affected versions (2)
- Cisco · Cisco Secure Email
- Cisco · Cisco Secure Email and Web Manager