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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:
18/12/2025

Description

Cisco is aware of a potential vulnerability.  Cisco is currently investigating and will update these details as appropriate as more information becomes available.

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:*:*:*:*:*:*:*:* 16.0.3-044 (including)
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:-:*:*:*:*:*:*:*
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_and_web_manager_m170:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m190:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m195:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m380:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m390:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m390x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m395:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:secure_email_and_web_manager_m680:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools