CVE-2025-20139 - CVE House
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Status published High CVE-2025-20139

A vulnerability in chat messaging features of Cisco Enterprise Chat...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

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

Timeline

Official Publish: April 2nd, 2025
Last Modified: April 2nd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-185

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.