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TI-2026-21301 Aliases CVE-2026-26352GHSA-7455-x3qx-74xc

Smoothwall Express < 3.1 Update 13 Stored XSS in vpnmain.cgi via VPN_IP Parameter

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00143 3rd percentileScored 2026-11-07
Fix Fixed Express (Smoothwall): 3.1 Update 13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SmoothwallExpressbefore 3.1 Update 133.1 Update 13Patch availableCNA
  • Express VendorSmoothwall Affected before 3.1 Update 13 Fixed in 3.1 Update 13 Patch available CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:o:smoothwall:smoothwall_express:*:*:*:*:*:*:*:*up to 3.0VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update1:*:*:-:*:*:*3.1 update1VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update10:*:*:-:*:*:*3.1 update10VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update11:*:*:-:*:*:*3.1 update11VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update12:*:*:-:*:*:*3.1 update12VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update2:*:*:-:*:*:*3.1 update2VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update3:*:*:-:*:*:*3.1 update3VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update4:*:*:-:*:*:*3.1 update4VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update5:*:*:-:*:*:*3.1 update5VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update6:*:*:-:*:*:*3.1 update6VulnerableSmoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:*:*:*:*:*:*:*:* Versions up to 3.0 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update1:*:*:-:*:*:* Versions 3.1 update1 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update10:*:*:-:*:*:* Versions 3.1 update10 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update11:*:*:-:*:*:* Versions 3.1 update11 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update12:*:*:-:*:*:* Versions 3.1 update12 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update2:*:*:-:*:*:* Versions 3.1 update2 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update3:*:*:-:*:*:* Versions 3.1 update3 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update4:*:*:-:*:*:* Versions 3.1 update4 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update5:*:*:-:*:*:* Versions 3.1 update5 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update6:*:*:-:*:*:* Versions 3.1 update6 Vulnerable ·Smoothwall
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update7:*:*:-:*:*:*3.1 update7VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update8:*:*:-:*:*:*3.1 update8VulnerableSmoothwall
cpe:2.3:o:smoothwall:smoothwall_express:3.1:update9:*:*:-:*:*:*3.1 update9VulnerableSmoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update7:*:*:-:*:*:* Versions 3.1 update7 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update8:*:*:-:*:*:* Versions 3.1 update8 Vulnerable ·Smoothwall
  • cpe:2.3:o:smoothwall:smoothwall_express:3.1:update9:*:*:-:*:*:* Versions 3.1 update9 Vulnerable ·Smoothwall

Remediation

  • Fix · CNA Express (Smoothwall) Fixed in 3.1 Update 13

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Smoothwall Express — community.smoothwall.org/forum/viewtopic.php?t=45095

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-21912 Smoothwall Express < 3.1 Update 13 Reflected XSS in redirect.cgi via url ParameterPriority LOW 22
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26352
  2. 2026-10-03 Alias added: GHSA-7455-x3qx-74xc

References

Patch 1

  • TI-2019-15448 Smoothwall Express 3.1 'preferences.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.3
  • TI-2019-15432 Smoothwall Express 3.1 'urlfilter.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.3
  • TI-2019-15445 Smoothwall Express 3.1 'iptools.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.1
  • TI-2019-15437 Smoothwall Express 3.1 'portfw.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.1
  • TI-2019-15436 Smoothwall Express 3.1 'apcupsd.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.1
  • TI-2019-15435 Smoothwall Express 3.1 'time.cgi' Cross-Site Scripting CVSS 4.0MEDIUM 5.1
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences