CVE-2026-26352 in Smoothwall Expressinfo

Summary

Smoothwall Express versions prior to 3.1 Update 13 contain a stored cross-site scripting vulnerability in the /cgi-bin/vpnmain.cgi script due to improper sanitation of the VPN_IP parameter. Authenticated attackers can inject arbitrary JavaScript through VPN configuration settings that executes when the affected page is viewed by other users.

Responsible

VulnCheck

Reservation

02/13/2026

Disclosure

03/30/2026

Entries

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerability	CWE	Exp	Cou	CVE
354215	Smoothwall Express vpnmain.cgi cross site scripting	79	Not defined	Official fix	CVE-2026-26352

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