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CVE-2026-13374 Details
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (ConnectWise Technology Integration module) allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-13937.
A stored cross-site scripting vulnerability has been identified in WatchGuard Fireware OS, specifically within the ConnectWise Technology Integration module. This issue arises from improper input neutralization during web page generation, allowing malicious scripts to be embedded and potentially executed. The vulnerability affects Fireware OS versions 12.4 through 12.12, 12.5 up to 12.5.18, and 2025.1 through 2026.2.
Users on Fireware OS 2025.1 can upgrade to version 2026.2.1. For those on Fireware OS 12.x, the recommended version is 12.12.1. However, users on Fireware OS 12.5.x (T15 & T35 models) do not have a resolved version available.
Metrics
CVSS 4.0 Severity and Vector Strings:
CNA: WatchGuard Technologies, Inc.CVSS-B:4.8 MEDIUMVector:CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 6, 2026Exploitation: NoneAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://psirt.watchguard.com/CVE-2026-13374 | WatchGuard Technologies, Inc. | |
| https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00016 | WatchGuard Technologies, Inc. | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | WatchGuard Technologies, Inc. |
Affected Products
| Product | Versions |
|---|---|
| watchguard fireware | >= 12.4, < 12.12.1 >= 2025.1, < 2026.2.1 >= 12.5, <= 12.5.18 |
CPE
Remediation
| |
| watchguard firebox m270 | All versions |
CPE
Remediation
| |
| watchguard firebox m290 | All versions |
CPE
Remediation
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| watchguard firebox m370 | All versions |
CPE
Remediation
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| watchguard firebox m390 | All versions |
CPE
Remediation
| |
| watchguard firebox m440 | All versions |
CPE
Remediation
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| watchguard firebox m4600 | All versions |
CPE
Remediation
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| watchguard firebox m470 | All versions |
CPE
Remediation
| |
| watchguard firebox m4800 | All versions |
CPE
Remediation
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| watchguard firebox m5600 | All versions |
CPE
Remediation
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| watchguard firebox m570 | All versions |
CPE
Remediation
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| watchguard firebox m5800 | All versions |
CPE
Remediation
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| watchguard firebox m590 | All versions |
CPE
Remediation
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| watchguard firebox m670 | All versions |
CPE
Remediation
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| watchguard firebox m690 | All versions |
CPE
Remediation
| |
| watchguard firebox nv5 | All versions |
CPE
Remediation
| |
| watchguard firebox t20 | All versions |
CPE
Remediation
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| watchguard firebox t25 | All versions |
CPE
Remediation
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| watchguard firebox t40 | All versions |
CPE
Remediation
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| watchguard firebox t45 | All versions |
CPE
Remediation
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| watchguard firebox t55 | All versions |
CPE
Remediation
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| watchguard firebox t70 | All versions |
CPE
Remediation
| |
| watchguard firebox t80 | All versions |
CPE
Remediation
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| watchguard firebox t85 | All versions |
CPE
Remediation
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| watchguard fireboxcloud | All versions |
CPE
Remediation
| |
| watchguard fireboxv | All versions |
CPE
Remediation
| |
| watchguard firebox m295 | All versions |
CPE
Remediation
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| watchguard firebox m395 | All versions |
CPE
Remediation
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| watchguard firebox m495 | All versions |
CPE
Remediation
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| watchguard firebox m595 | All versions |
CPE
Remediation
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| watchguard firebox m695 | All versions |
CPE
Remediation
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| watchguard firebox t115-w | All versions |
CPE
Remediation
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| watchguard firebox t125 | All versions |
CPE
Remediation
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| watchguard firebox t125-w | All versions |
CPE
Remediation
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| watchguard firebox t145 | All versions |
CPE
Remediation
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| watchguard firebox t145-w | All versions |
CPE
Remediation
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| watchguard firebox t185 | All versions |
CPE
Remediation
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| watchguard firebox t15 | All versions |
CPE
Remediation
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| watchguard firebox t35 | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 28, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Aug 10, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Jul 9, 2026 | Initial Analysis | [email protected] |
| Jul 7, 2026 | CVE Modified | CISA-ADP |
| Jul 3, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Jul 3, 2026 | New CVE Received | WatchGuard Technologies, Inc. |