CVE-2026-20172 — Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability

Description (CNA)

A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent. This vulnerability is due to inadequate validation of file contents during file upload operations. An attacker could exploit this vulnerability by uploading a file that contains malicious scripts or HTML code, which the application could make available to other users to access. A successful exploit could allow the attacker to execute the contents of that file in the browser of a user and conduct browser-based attacks. 

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco Enterprise Chat and Email	affected 11.6(1)_ES3; affected 11.6(1)_ES4; affected 12.0(1)_ES6; affected 11.6(1)_ES8; affected 12.0(1)_ES5a; affected 11.6(1)_ES9; affected 12.0(1)_ES6_ET1; affected 11.6(1)_ES6; affected 11.6(1)_ES5; affected 12.5(1)_ET1; affected 12.5(1); affected 12.5(1)_ES3_ET1; affected 12.0(1)_ES3; affected 11.6(1)_ES11; affected 12.0(1)_ES4; affected 12.0(1)_ES5; affected 11.6(1)_ES2; affected 11.6(1)_ES9a; affected 11.6(1)_ES10; affected 12.0(1)_ES1; affected 12.0(1); affected 12.5(1)_ES3; affected 12.6(1); affected 11.5(1); affected 12.0(1)_ES2; affected 11.6(1)_ES7; affected 12.5(1)_ES2; affected 12.6(1)_ET1; affected 11.6(1); affected 12.5(1)_ES1; affected 12.6(1)_ET2; affected 12.5(1)_ES3_ET2; affected 12.0(1)_ES6_ET2; affected 12.6(1)_ES1; affected 12.5(1)_ES4; affected 11.6(1)_ES12; affected 12.6(1)_ET3; affected 12.5(1)_ES4_ET1; affected 12.0(1)_ES6_ET3; affected 12.6(1)_ES1_ET1; affected 12.6(1)_ES2; affected 12.6_ES2_ET1; affected 12.5(1)_ES5; affected 12.6_ES2_ET2; affected 12.0(1)_ES7; affected 12.6_ES2_ET3; affected 12.0(1)_ES7_ET1; affected 12.5(1)_ES5_ET1; affected 12.6_ES2_ET4; affected 12.6(1)_ES3; affected 11.6(1)_ES12_ET1; affected 12.6_ES3_ET1; affected 12.5(1)_ES6; affected 12.6_ES3_ET2; affected 12.6(1)_ES4; affected 12.5(1)_ES7; affected 12.6(1)_ES4_ET1; affected 12.6(1)_ES5; affected 12.6(1)_ES5_ET1; affected 12.6(1)_ES5_ET2; affected 12.6(1)_ES6; affected 12.6(1)_ES6_ET1; affected 12.5(1)_ES8; affected 12.6(1)_ES6_ET2; affected 12.6(1)_ES7; affected 12.6(1)_ES8; affected 12.6(1)_ES4_ET2; affected 12.6(1)_ES3_ET3; affected 12.6(1)_ES2_ET5; affected 12.6(1)_ES1_ET2; affected 12.6(1)_ES8_ET1; affected 12.6(1)_ES7_ET1; affected 12.6(1)_ES6_ET3; affected 12.6(1)_ES5_ET3; affected 12.5(1)_ES8_ET1; affected 12.5(1)_ES3_ET3; affected 12.5(1)_ES5_ET2; affected 12.5(1)_ES6_ET1; affected 12.5(1)_ES4_ET2; affected 12.5(1)_ES7_ET1; affected 12.6(1)_ES8_ET2; affected 12.6(1)_ES9; affected 12.6(1)_ES9_ET1; affected 12.5(1)_ES9; affected 12.6(1)_ES9_ET2; affected 12.6(1)_ES9_ET3; affected 12.6(1)_ES10; affected 12.6(1)_ES10_ET1; affected 15.0(1); affected 12.6(1)_ES11; affected 15.0(1)_ET1; affected 15.0(1)ES202508; affected 12.6(1)_ES11_ET1; affected 12.6(1)_ES11_ET2; affected 12.6(1)_ES12; affected 15.0(1)ES202511; affected 12.6(1)_ES12_ET1; affected 15.0(1)ES202511_ET1; affected 12.5(1)_ES10

Vendor / product

Versions

Cisco / Cisco Enterprise Chat and Email

affected 11.6(1)_ES3; affected 11.6(1)_ES4; affected 12.0(1)_ES6; affected 11.6(1)_ES8; affected 12.0(1)_ES5a; affected 11.6(1)_ES9; affected 12.0(1)_ES6_ET1; affected 11.6(1)_ES6; affected 11.6(1)_ES5; affected 12.5(1)_ET1; affected 12.5(1); affected 12.5(1)_ES3_ET1; affected 12.0(1)_ES3; affected 11.6(1)_ES11; affected 12.0(1)_ES4; affected 12.0(1)_ES5; affected 11.6(1)_ES2; affected 11.6(1)_ES9a; affected 11.6(1)_ES10; affected 12.0(1)_ES1; affected 12.0(1); affected 12.5(1)_ES3; affected 12.6(1); affected 11.5(1); affected 12.0(1)_ES2; affected 11.6(1)_ES7; affected 12.5(1)_ES2; affected 12.6(1)_ET1; affected 11.6(1); affected 12.5(1)_ES1; affected 12.6(1)_ET2; affected 12.5(1)_ES3_ET2; affected 12.0(1)_ES6_ET2; affected 12.6(1)_ES1; affected 12.5(1)_ES4; affected 11.6(1)_ES12; affected 12.6(1)_ET3; affected 12.5(1)_ES4_ET1; affected 12.0(1)_ES6_ET3; affected 12.6(1)_ES1_ET1; affected 12.6(1)_ES2; affected 12.6_ES2_ET1; affected 12.5(1)_ES5; affected 12.6_ES2_ET2; affected 12.0(1)_ES7; affected 12.6_ES2_ET3; affected 12.0(1)_ES7_ET1; affected 12.5(1)_ES5_ET1; affected 12.6_ES2_ET4; affected 12.6(1)_ES3; affected 11.6(1)_ES12_ET1; affected 12.6_ES3_ET1; affected 12.5(1)_ES6; affected 12.6_ES3_ET2; affected 12.6(1)_ES4; affected 12.5(1)_ES7; affected 12.6(1)_ES4_ET1; affected 12.6(1)_ES5; affected 12.6(1)_ES5_ET1; affected 12.6(1)_ES5_ET2; affected 12.6(1)_ES6; affected 12.6(1)_ES6_ET1; affected 12.5(1)_ES8; affected 12.6(1)_ES6_ET2; affected 12.6(1)_ES7; affected 12.6(1)_ES8; affected 12.6(1)_ES4_ET2; affected 12.6(1)_ES3_ET3; affected 12.6(1)_ES2_ET5; affected 12.6(1)_ES1_ET2; affected 12.6(1)_ES8_ET1; affected 12.6(1)_ES7_ET1; affected 12.6(1)_ES6_ET3; affected 12.6(1)_ES5_ET3; affected 12.5(1)_ES8_ET1; affected 12.5(1)_ES3_ET3; affected 12.5(1)_ES5_ET2; affected 12.5(1)_ES6_ET1; affected 12.5(1)_ES4_ET2; affected 12.5(1)_ES7_ET1; affected 12.6(1)_ES8_ET2; affected 12.6(1)_ES9; affected 12.6(1)_ES9_ET1; affected 12.5(1)_ES9; affected 12.6(1)_ES9_ET2; affected 12.6(1)_ES9_ET3; affected 12.6(1)_ES10; affected 12.6(1)_ES10_ET1; affected 15.0(1); affected 12.6(1)_ES11; affected 15.0(1)_ET1; affected 15.0(1)ES202508; affected 12.6(1)_ES11_ET1; affected 12.6(1)_ES11_ET2; affected 12.6(1)_ES12; affected 15.0(1)ES202511; affected 12.6(1)_ES12_ET1; affected 15.0(1)ES202511_ET1; affected 12.5(1)_ES10

CWE

CWE-646

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-lite-agent-BCgSN8eb

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.