CVE-2019-25426Public exploitNetwork attack vector

Browser script execution via unencoded dnsmasq parameters

Published Feb 19, 2026 · Updated Feb 19, 2026

Reflected XSS in Comodo Dome Firewall 2.7.0 allows remote attackers to execute JavaScript in a user's browser via crafted POST data. The dnsmasq endpoint returns TRANSPARENT_SOURCE_BYPASS or TRANSPARENT_DESTINATION_BYPASS input without neutralizing script markup. Exploitation requires a user to render the crafted response and permits script actions within that user's browser context.

CVSS severity5.1
Medium
EPSS probability0.37%
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 Comodo Dome Firewall 2.7.0 allows remote attackers to execute JavaScript in a user's browser via crafted POST data. The dnsmasq endpoint returns TRANSPARENT_SOURCE_BYPASS or TRANSPARENT_DESTINATION_BYPASS input without neutralizing script markup. Exploitation requires a user to render the crafted response and permits script actions within that user's browser context.

The record

CVE
CVE-2019-25426
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
Comodo Group, Inc.
Product
Comodo Dome Firewall
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 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=2.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Comodo Group, Inc. · Comodo Dome Firewallversion=2.7.0

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/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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