Actively exploited in the wild
Cisco Multiple Products Improper Input Validation Vulnerability
Cisco - Multiple Products · Listed in the CISA KEV since 2025-12-17. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2025-20393
CriticalCVSS 10.0KEVSummary
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. The issue is due to insufficient validation of HTTP requests by the Spam Quarantine feature.
Risk Assessment
An attacker can gain full control of the device, potentially compromising the security of the entire email and network infrastructure.
Recommendation
Apply updates or patches provided by Cisco for affected versions of AsyncOS software.
Other vulnerabilities in Cisco AsyncOS
Original NVD description (English source)
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.