# CVE-2025-20139

## Summary

- **CVE ID:** CVE-2025-20139
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-185
- **Published:** Apr 2, 2025
- **Last Modified:** Mar 12, 2026

## Description

A vulnerability in chat messaging features of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

 This vulnerability is due to improper validation of user-supplied input to chat entry points. An attacker could exploit this vulnerability by sending malicious requests to a messaging chat entry point in the affected application. A successful exploit could allow the attacker to cause the application to stop responding, resulting in a DoS condition. The application may not recover on its own and may need an administrator to manually restart services to recover.

## Affected Products

- Cisco — Cisco Enterprise Chat and Email (11.5(1))
- Cisco — Cisco Enterprise Chat and Email (11.6(1))
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES2)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES3)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES4)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES5)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES6)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES10)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES11)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES7)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES8)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES9)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES9a)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES12)
- Cisco — Cisco Enterprise Chat and Email (11.6(1)_ES12_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.0(1))
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES1)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES2)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES3)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES4)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES5)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES5a)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES6)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES6_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES6_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES6_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES7)
- Cisco — Cisco Enterprise Chat and Email (12.0(1)_ES7_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1))
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES2)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES3)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES3_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES4)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES3_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES4_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES5)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES5_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES6)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES7)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES8)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES8_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES3_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES5_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES6_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES4_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES7_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.5(1)_ES9)
- Cisco — Cisco Enterprise Chat and Email (12.6(1))
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES1_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES3)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES4)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES4_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES5)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES5_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES5_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES6)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES6_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES6_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES7)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES8)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES4_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES3_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES2_ET5)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES1_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES8_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES7_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES6_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES5_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES8_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES9)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES9_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES9_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6(1)_ES9_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES2_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES2_ET2)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES2_ET3)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES2_ET4)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES3_ET1)
- Cisco — Cisco Enterprise Chat and Email (12.6_ES3_ET2)

## References

- [CNA](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-dos-tC6m9GZ8)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.64%
- **EPSS Percentile:** 48.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._