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CVE-2019-25394

Smoothwall Express 3.1 'modem.cgi' Cross-Site Scripting

Published: Feb 16, 2026Updated: Feb 20, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
7.2CVSSHIGH
EPSS Score
0.2%
Top 87.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

Description

Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple stored cross-site scripting vulnerabilities in the modem.cgi script that allow attackers to inject malicious scripts through POST parameters. Attackers can submit crafted payloads in parameters like INIT, HANGUP, SPEAKER_ON, SPEAKER_OFF, TONE_DIAL, and PULSE_DIAL to execute arbitrary JavaScript in users' browsers when the stored data is retrieved.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

smoothwall expresssmoothwall
On-prem
Networking Infrastructure / firewall
Smoothwall ExpressSmoothwall
On-prem
Networking Infrastructure / firewall
smoothwallcommercialNetworking Infrastructure

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

http://www.smoothwall.org
smoothwall.org
https://www.exploit-db.com/exploits/46333
exploit-db.com
https://www.vulncheck.com/advisories/smoothwall-express-modemcgi-cross-site-scripting
vulncheck.com

Timeline

Published
Feb 16, 2026
Last Updated
Feb 20, 2026

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