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CVE-2025-20393

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
17/12/2025
Last modified:
16/01/2026

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.<br /> <br /> 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&amp;nbsp;root privileges.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 10.00 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
10.00
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 15.0.5-016 (excluding)
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 15.5 (including) 15.5.4-012 (excluding)
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 16.0 (including) 16.0.4-016 (excluding)
cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c100v:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c300v:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c600v:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_gateway_c195:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_gateway_c395:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_gateway_c695:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 15.0.2-007 (excluding)
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 15.5 (including) 15.5.4-007 (excluding)
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* 16.0 (including) 16.0.4-010 (excluding)
cpe:2.3:a:cisco:secure_email_and_web_manager_virtual_appliance_m100v:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_email_and_web_manager_virtual_appliance_m300v:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_email_and_web_manager_virtual_appliance_m600v:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools