SB2026050712 - Reliance on File Name or Extension of Externally-Supplied File in Cisco Enterprise Chat and Email
Published: May 7, 2026
Security Bulletin ID
SB2026050712
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Reliance on File Name or Extension of Externally-Supplied File (CVE-ID: CVE-2026-20172)
CWE-ID: CWE-646 - Reliance on File Name or Extension of Externally-Supplied File
CVSSv4: 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
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.
Remediation
Install update from vendor's website.