CVE-2025-20393: Cisco Multiple Products Improper Input Validation 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. 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.
Other sources
Cisco Secure Email Gateway, Secure Email, AsyncOS Software, and Web Manager appliances contains an improper input validation vulnerability that allows threat actors to execute arbitrary commands with root privileges on the underlying operating system of an affected appliance.
— CISA
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Managerfrom your environment.Discontinue use of the product if mitigations are unavailable.
- Compensating control
Apply mitigations per vendor instructions.
- Compensating control
Follow applicable BOD 22-01 guidance for cloud services.
Event History
Frequently Asked Questions
What is the severity of CVE-2025-20393?
The severity of CVE-2025-20393 has not yet been disclosed, as Cisco is still investigating this potential vulnerability.
How do I fix CVE-2025-20393?
Currently, there is no official fix available for CVE-2025-20393 as Cisco is actively investigating the issue.
Why is CVE-2025-20393 a concern for Cisco users?
CVE-2025-20393 is a concern for Cisco users because it involves vulnerabilities in critical email and management appliances that could be exploited.
Which Cisco products are affected by CVE-2025-20393?
CVE-2025-20393 affects multiple Cisco products including the Cisco Secure Email Gateway and AsyncOS Software.
When will Cisco provide updates on CVE-2025-20393?
Cisco has stated they will update details regarding CVE-2025-20393 as more information becomes available during their investigation.