Reliance on File Name or Extension of Externally-Supplied File in Enterprise Chat and Email - CVE-2026-20172

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Main Vulnerability Database Vulnerabilities #VU130283

Reliance on File Name or Extension of Externally-Supplied File in Enterprise Chat and Email - CVE-2026-20172

Published: May 7, 2026


Vulnerability identifier: #VU130283
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-20172
CWE-ID: CWE-646
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Enterprise Chat and Email

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to inadequate validation of file contents during file upload operations in the Lite Agent feature. A remote user can upload a malicious file and conduct browser-based attacks.


How to mitigate CVE-2026-20172

Install updates from vendor's website.

Sources