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CVE-2026-20172

22
FAUCET Score

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. 

First published: May 6, 2026Last modified: May 6, 2026

Impacted Technologies

VendorProductVersion(s)CPE
CiscoCisco Enterprise Chat And Email
11.5(1), 11.6(1), 11.6(1)_ES10, 11.6(1)_ES11, 11.6(1)_ES12, 11.6(1)_ES12_ET1, 11.6(1)_ES2, 11.6(1)_ES3, 11.6(1)_ES4, 11.6(1)_ES5, 11.6(1)_ES6, 11.6(1)_ES7, 11.6(1)_ES8, 11.6(1)_ES9, 11.6(1)_ES9a, 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)_ES10, 12.5(1)_ES2, 12.5(1)_ES3, 12.5(1)_ES3_ET1, 12.5(1)_ES3_ET2, 12.5(1)_ES3_ET3, 12.5(1)_ES4, 12.5(1)_ES4_ET1, 12.5(1)_ES4_ET2, 12.5(1)_ES5, 12.5(1)_ES5_ET1, 12.5(1)_ES5_ET2, 12.5(1)_ES6, 12.5(1)_ES6_ET1, 12.5(1)_ES7, 12.5(1)_ES7_ET1, 12.5(1)_ES8, 12.5(1)_ES8_ET1, 12.5(1)_ES9, 12.5(1)_ET1, 12.6(1), 12.6(1)_ES1, 12.6(1)_ES10, 12.6(1)_ES10_ET1, 12.6(1)_ES11, 12.6(1)_ES11_ET1, 12.6(1)_ES11_ET2, 12.6(1)_ES12, 12.6(1)_ES12_ET1, 12.6(1)_ES1_ET1, 12.6(1)_ES1_ET2, 12.6(1)_ES2, 12.6(1)_ES2_ET5, 12.6(1)_ES3, 12.6(1)_ES3_ET3, 12.6(1)_ES4, 12.6(1)_ES4_ET1, 12.6(1)_ES4_ET2, 12.6(1)_ES5, 12.6(1)_ES5_ET1, 12.6(1)_ES5_ET2, 12.6(1)_ES5_ET3, 12.6(1)_ES6, 12.6(1)_ES6_ET1, 12.6(1)_ES6_ET2, 12.6(1)_ES6_ET3, 12.6(1)_ES7, 12.6(1)_ES7_ET1, 12.6(1)_ES8, 12.6(1)_ES8_ET1, 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(1)_ET1, 12.6(1)_ET2, 12.6(1)_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, 15.0(1), 15.0(1)ES202508, 15.0(1)ES202511, 15.0(1)ES202511_ET1, 15.0(1)_ET1CNA affecteddefault unknown

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.13%
Probability of exploitation in next 30 days
EPSS Percentile
2.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0013 is in the 0th percentile among its peer group of 21,939 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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