CVE-2026-20172

Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability

Published May 6, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Enterprise Chat and Email

unknown

Version	Status	Constraints
`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`	affected	—

No data.

Vendor Product Versions

Cisco

Enterprise Chat And Email

Version	Status	Scheme	Platform
`11.6(1)_ES3`	affected	generic	—
`11.6(1)_ES4`	affected	generic	—
`12.0(1)_ES6`	affected	generic	—
`11.6(1)_ES8`	affected	generic	—
`12.0(1)_ES5a`	affected	generic	—
`11.6(1)_ES9`	affected	generic	—
`12.0(1)_ES6_ET1`	affected	generic	—
`11.6(1)_ES6`	affected	generic	—
`11.6(1)_ES5`	affected	generic	—
`12.5(1)_ET1`	affected	generic	—
`12.5(1)`	affected	generic	—
`12.5(1)_ES3_ET1`	affected	generic	—
`12.0(1)_ES3`	affected	generic	—
`11.6(1)_ES11`	affected	generic	—
`12.0(1)_ES4`	affected	generic	—
`12.0(1)_ES5`	affected	generic	—
`11.6(1)_ES2`	affected	generic	—
`11.6(1)_ES9a`	affected	generic	—
`11.6(1)_ES10`	affected	generic	—
`12.0(1)_ES1`	affected	generic	—
`12.0(1)`	affected	generic	—
`12.5(1)_ES3`	affected	generic	—
`12.6(1)`	affected	generic	—
`11.5(1)`	affected	generic	—
`12.0(1)_ES2`	affected	generic	—
`11.6(1)_ES7`	affected	generic	—
`12.5(1)_ES2`	affected	generic	—
`12.6(1)_ET1`	affected	generic	—
`11.6(1)`	affected	generic	—
`12.5(1)_ES1`	affected	generic	—
`12.6(1)_ET2`	affected	generic	—
`12.5(1)_ES3_ET2`	affected	generic	—
`12.0(1)_ES6_ET2`	affected	generic	—
`12.6(1)_ES1`	affected	generic	—
`12.5(1)_ES4`	affected	generic	—
`11.6(1)_ES12`	affected	generic	—
`12.6(1)_ET3`	affected	generic	—
`12.5(1)_ES4_ET1`	affected	generic	—
`12.0(1)_ES6_ET3`	affected	generic	—
`12.6(1)_ES1_ET1`	affected	generic	—
`12.6(1)_ES2`	affected	generic	—
`12.6_ES2_ET1`	affected	generic	—
`12.5(1)_ES5`	affected	generic	—
`12.6_ES2_ET2`	affected	generic	—
`12.0(1)_ES7`	affected	generic	—
`12.6_ES2_ET3`	affected	generic	—
`12.0(1)_ES7_ET1`	affected	generic	—
`12.5(1)_ES5_ET1`	affected	generic	—
`12.6_ES2_ET4`	affected	generic	—
`12.6(1)_ES3`	affected	generic	—
`11.6(1)_ES12_ET1`	affected	generic	—
`12.6_ES3_ET1`	affected	generic	—
`12.5(1)_ES6`	affected	generic	—
`12.6_ES3_ET2`	affected	generic	—
`12.6(1)_ES4`	affected	generic	—
`12.5(1)_ES7`	affected	generic	—
`12.6(1)_ES5`	affected	generic	—
`12.6(1)_ES5_ET1`	affected	generic	—
`12.6(1)_ES5_ET2`	affected	generic	—
`12.6(1)_ES6`	affected	generic	—
`12.6(1)_ES6_ET1`	affected	generic	—
`12.5(1)_ES8`	affected	generic	—
`12.6(1)_ES6_ET2`	affected	generic	—
`12.6(1)_ES7`	affected	generic	—
`12.6(1)_ES8`	affected	generic	—
`12.6(1)_ES4_ET2`	affected	generic	—
`12.6(1)_ES3_ET3`	affected	generic	—
`12.6(1)_ES2_ET5`	affected	generic	—
`12.6(1)_ES1_ET2`	affected	generic	—
`12.6(1)_ES8_ET1`	affected	generic	—
`12.6(1)_ES7_ET1`	affected	generic	—
`12.6(1)_ES6_ET3`	affected	generic	—
`15.0(1)`	affected	generic	—
`12.6(1)_ES11`	affected	generic	—
`15.0(1)_ET1`	affected	generic	—
`15.0(1)ES202508`	affected	generic	—
`12.6(1)_ES11_ET1`	affected	generic	—
`12.6(1)_ES11_ET2`	affected	generic	—
`12.6(1)_ES12`	affected	generic	—
`15.0(1)ES202511`	affected	generic	—
`12.6(1)_ES12_ET1`	affected	generic	—
`15.0(1)ES202511_ET1`	affected	generic	—
`12.5(1)_ES10`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.125% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

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

History

May 7, 2026 8:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco enterprise Chat And Email
Vendors & Products		Cisco Cisco enterprise Chat And Email

May 6, 2026 6:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

May 6, 2026 4:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability
Weaknesses		CWE-646
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-lite-agent-BCgSN8eb
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}`