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CVE-2025-20393

CRITICAL CVSS: 10.0 Published: 2025-12-17 Modified: 2026-06-17

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 Platforms

Cisco Secure Email And Web Manager Virtual Appliance M600VCisco Secure Email And Web Manager M380Cisco Secure Email Gateway Virtual Appliance C300VCisco Secure Email And Web Manager M190Cisco Secure Email Gateway C695Cisco Secure Email And Web Manager M690Cisco Secure Email Gateway Virtual Appliance C100VCisco Secure Email And Web Manager Virtual Appliance M100VCisco Secure Email And Web Manager M690XCisco Secure Email And Web Manager M695

Weakness Type

CWE-20

References