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

CVSS 4.3 · Medium EPSS 0.02% · P5
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I. Basic Information for CVE-2026-20172

Vulnerability Information
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Vulnerability Title
Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability 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. 
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
依赖于外部提供文件的文件名或扩展名
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Enterprise Chat and Email 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Enterprise Chat and Email（Cisco ECE）是美国思科（Cisco）公司的一套企业聊天和电子邮件解决方案。该产品主要为其它Cisco解决方案提供电子邮件、聊天和Web回调功能等。 Cisco Enterprise Chat and Email存在安全漏洞，该漏洞源于文件上传操作期间文件内容验证不足，可能导致经过身份验证的远程攻击者上传包含恶意脚本或HTML代码的文件，从而在用户浏览器中执行内容并发起基于浏览器的攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
CiscoCisco Enterprise Chat and Email 11.6(1)_ES3 -

II. Public POCs for CVE-2026-20172

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III. Intelligence Information for CVE-2026-20172

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IV. Related Vulnerabilities

Same product: Cisco Enterprise Chat and Email
Same vendor: Cisco
Same weakness: CWE-646

V. Comments for CVE-2026-20172

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