CVE-2019-25380Public exploitNetwork attack vector

Browser script execution via unencoded DHCP parameters

Published Feb 16, 2026 · Updated Feb 16, 2026

Reflected XSS in Smoothwall Express 3.1 allows remote attackers to execute JavaScript in a user's browser through crafted dhcp.cgi POST parameters. The CGI handler returns DHCP configuration fields such as BOOT_SERVER and STATIC_IP in its HTML response without neutralizing script markup. Exploitation requires a user to process the crafted response; injected code runs in that user's browser context and can read or alter page data.

CVSS severity5.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Smoothwall Express 3.1 allows remote attackers to execute JavaScript in a user's browser through crafted dhcp.cgi POST parameters. The CGI handler returns DHCP configuration fields such as BOOT_SERVER and STATIC_IP in its HTML response without neutralizing script markup. Exploitation requires a user to process the crafted response; injected code runs in that user's browser context and can read or alter page data.

The record

CVE
CVE-2019-25380
Published
Feb 16, 2026
Updated
Feb 16, 2026
Vendor
Smoothwall
Product
Smoothwall Express
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Smoothwall · Smoothwall Expressversion=3.1

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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