NVD

CVE-2025-20393 Detail

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

Nist CVSS score does not match with CNA score

CNA: Cisco Systems, Inc.

Base Score: 10.0 CRITICAL

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4	Cisco Systems, Inc.	Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393	CISA-ADP	US Government Resource

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Cisco Multiple Products Improper Input Validation Vulnerability	12/17/2025	12/24/2025	Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

CVE Modified by Cisco Systems, Inc. 6/17/2026 4:41:39 AM

Action

Type

Old Value

New Value

Added

Affected

Record truncated, showing 2048 of 2175 characters.
View Entire Change Record

[{"vendor":"Cisco","product":"Cisco Secure Email","defaultStatus":"unknown","versions":[{"version":"14.0.0-698","status":"affected"},{"version":"13.5.1-277","status":"affected"},{"version":"13.0.0-392","status":"affected"},{"version":"14.2.0-620","status":"affected"},{"version":"13.0.5-007","status":"affected"},{"version":"13.5.4-038","status":"affected"},{"version":"14.2.1-020","status":"affected"},{"version":"14.3.0-032","status":"affected"},{"version":"15.0.0-104","status":"affected"},{"version":"15.0.1-030","status":"affected"},{"version":"15.5.0-048","status":"affected"},{"version":"15.5.1-055","status":"affected"},{"version":"15.5.2-018","status":"affected"},{"version":"16.0.0-050","status":"affected"},{"version":"15.0.3-002","status":"affected"},{"version":"16.0.0-054","status":"affected"},{"version":"15.5.3-022","status":"affected"},{"version":"16.0.1-017","status":"affected"}]},{"vendor":"Cisco","product":"Cisco Secure Email and Web Manager","defaultStatus":"unknown","versions":[{"version":"13.6.2-023","status":"affected"},{"version":"13.6.2-078","status":"affected"},{"version":"13.0.0-249","status":"affected"},{"version":"13.0.0-277","status":"affected"},{"version":"13.8.1-052","status":"affected"},{"version":"13.8.1-068","status":"affected"},{"version":"13.8.1-074","status":"affected"},{"version":"14.0.0-404","status":"affected"},{"version":"12.8.1-002","status":"affected"},{"version":"14.1.0-227","status":"affected"},{"version":"13.6.1-201","status":"affected"},{"version":"14.2.0-203","status":"affected"},{"version":"14.2.0-212","status":"affected"},{"version":"12.8.1-021","status":"affected"},{"version":"13.8.1-108","status":"affected"},{"version":"14.2.0-224","status":"affected"},{"version":"14.3.0-120","status":"affected"},{"version":"15.0.0-334","status":"affected"},{"version":"15.5.1-024","status":"affected"},{"version":"15.5.1-029","status":"affected"},{"version":"15.5.2-005","status":"affected"},{"version":"16.0.0-195","status":"affected"},{"version":"15.5.3-017","status":"affected"},{"version"

Modified Analysis by NIST 1/16/2026 9:00:12 AM

Action

Type

Old Value

New Value

Changed

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (including) 16.0.3-044
     OR
          cpe:2.3:h:cisco:secure_email_and_web_manager_m195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m695:-:*:*:*:*:*:*:*
          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_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_m680:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690x:-:*:*:*:*:*:*:*
          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_gateway_c195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c695:-:*:*:*:*:*:*:*

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0.5-016
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 15.5 up to (excluding) 15.5.4-012
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 16.0 up to (excluding) 16.0.4-016
     OR
          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:-:*:*:*:*:*:*:*

Changed

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (including) 16.0.3-044
     OR
          cpe:2.3:h:cisco:secure_email_and_web_manager_m195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m695:-:*:*:*:*:*:*:*
          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_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_m680:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690x:-:*:*:*:*:*:*:*
          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_gateway_c195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c695:-:*:*:*:*:*:*:*

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0.5-016
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 15.5 up to (excluding) 15.5.4-012
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 16.0 up to (excluding) 16.0.4-016
     OR
          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:-:*:*:*:*:*:*:*

Added

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0.2-007
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 15.5 up to (excluding) 15.5.4-007
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 16.0 up to (excluding) 16.0.4-010
     OR
          cpe:2.3:h:cisco:secure_email_and_web_manager_m195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m695:-:*:*:*:*:*:*:*
          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_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_m680:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690x:-:*:*:*:*:*:*:*
          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:-:*:*:*:*:*:*:*

Initial Analysis by NIST 12/18/2025 10:41:16 AM

Action

Type

Old Value

New Value

Added

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions up to (including) 16.0.3-044
     OR
          cpe:2.3:h:cisco:secure_email_and_web_manager_m195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m695:-:*:*:*:*:*:*:*
          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_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_m680:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_and_web_manager_m690x:-:*:*:*:*:*:*:*
          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_gateway_c195:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c395:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:secure_email_gateway_c695:-:*:*:*:*:*:*:*

Added

Reference Type

CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393 Types: US Government Resource

Added

Reference Type

Cisco Systems, Inc.: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4 Types: Vendor Advisory

CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government 12/17/2025 9:00:03 PM

Action	Type	New Value
Added	Date Added	2025-12-17
Added	Due Date	2025-12-24
Added	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.
Added	Vulnerability Name	Cisco Multiple Products Improper Input Validation Vulnerability

New CVE Received from Cisco Systems, Inc. 12/17/2025 12:15:48 PM

Action	Type	New Value
Added	Description	Cisco is aware of a potential vulnerability.  Cisco is currently investigating and will update these details as appropriate as more information becomes available.
Added	CVSS V3.1	AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Added	CWE	CWE-20
Added	Reference	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4

Quick Info

CVE Dictionary Entry:
CVE-2025-20393
NVD Published Date:
12/17/2025
NVD Last Modified:
06/17/2026
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2025-20393 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 4:41:39 AM

CVE Modified by Cisco Systems, Inc. 6/17/2026 4:41:39 AM

Modified Analysis by NIST 1/16/2026 9:00:12 AM

CVE Modified by Cisco Systems, Inc. 1/15/2026 12:16:03 PM

Initial Analysis by NIST 12/18/2025 10:41:16 AM

CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government 12/17/2025 9:00:03 PM

CVE Modified by CISA-ADP 12/17/2025 4:15:54 PM

New CVE Received from Cisco Systems, Inc. 12/17/2025 12:15:48 PM

Quick Info