Vulnerability · Published May 6, 2026 · Assigned by cisco
CVE-2026-20172Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability
Medium 4.3
In plain English
A medium-severity security flaw in Cisco Enterprise Chat and Email from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Enterprise Chat and Email | 11.6(1)_ES311.6(1)_ES412.0(1)_ES611.6(1)_ES812.0(1)_ES5a11.6(1)_ES912.0(1)_ES6_ET111.6(1)_ES6 |
Weakness: CWE-646 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N