---
title: "CVE-2025-20393: Cisco Secure Email Gateway and Cisco… | CubePath"
description: "A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager…"
language: en
source: https://cubepath.com/security/cve/CVE-2025-20393
---

# CVE-2025-20393: Cisco Secure Email Gateway and Cisco… | CubePath

## 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.

Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-20393)

## Key data

### CVSS 3.1 Critical 10.0

Score published by cisco in the CVE record.

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

| Metric                 | Value   | What it means                                                                       |
| ---------------------- | ------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low     | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None    | No account or privileges are needed.                                                |
| User interaction       | None    | No action from any user is needed.                                                  |
| Scope                  | Changed | The impact can reach other components beyond the vulnerable one.                    |
| Confidentiality impact | High    | Serious or total effect on the secrecy of data.                                     |
| Integrity impact       | High    | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | High    | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.32392 (32.4% probability)

Percentile

98.3%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Cisco Multiple Products Improper Input Validation Vulnerability

Added to the catalog

Dec 17, 2025

Federal due date

Dec 24, 2025

### CISA assessment as of Dec 18, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

yes

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-20](https://cwe.mitre.org/data/definitions/20.html) Improper Input Validation

## Affected products

Products listed in the CVE record, as the CNA published them.

- Cisco Secure Email

  - affected: 14.0.0-698
  - affected: 13.5.1-277
  - affected: 13.0.0-392
  - affected: 14.2.0-620
  - affected: 13.0.5-007
  - affected: 13.5.4-038
  - affected: 14.2.1-020
  - affected: 14.3.0-032
  - affected: 15.0.0-104
  - affected: 15.0.1-030
  - affected: 15.5.0-048
  - affected: 15.5.1-055
  - affected: 15.5.2-018
  - affected: 16.0.0-050
  - affected: 15.0.3-002
  - affected: 16.0.0-054
  - affected: 15.5.3-022
  - affected: 16.0.1-017
- Cisco Secure Email and Web Manager

  - affected: 13.6.2-023
  - affected: 13.6.2-078
  - affected: 13.0.0-249
  - affected: 13.0.0-277
  - affected: 13.8.1-052
  - affected: 13.8.1-068
  - affected: 13.8.1-074
  - affected: 14.0.0-404
  - affected: 12.8.1-002
  - affected: 14.1.0-227
  - affected: 13.6.1-201
  - affected: 14.2.0-203
  - affected: 14.2.0-212
  - affected: 12.8.1-021
  - affected: 13.8.1-108
  - affected: 14.2.0-224
  - affected: 14.3.0-120
  - affected: 15.0.0-334
  - affected: 15.5.1-024
  - affected: 15.5.1-029
  - affected: 15.5.2-005
  - affected: 16.0.0-195
  - affected: 15.5.3-017
  - affected: 16.0.1-010
  - affected: 15.0.1-035
  - and 1 more

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [cisco-sa-sma-attack-N9bf4](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4)  (sec.cloudapps.cisco.com)

## Timeline

1. ID reserved Oct 10, 2024
2. Added to CISA KEV Dec 17, 2025
3. Record published Dec 17, 2025
4. Record last updated Oct 7, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:14 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)