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CVE-2026-13728— WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database

Quick assessment

Affected
WatchGuard Fireware OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WatchGuard Fireware OS是美国WatchGuard公司的一款网络防火墙的操作系统。 WatchGuard Fireware OS 12.1及之前版本和2025.1及之前版本存在信任管理问题漏洞，该漏洞源于使用硬编码加密密钥加密Access Portal资源保存的凭据，可能导致凭据信息泄露。以下版本受到影响：12.1至12.12版本和2025.1至2026.2版本。

CVSS 5.9 · Medium EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1552.005 · Cloud Instance Metadata API

Affected Version Matrix 3

VendorProduct Version RangeStatus
WatchGuard Fireware OS 2025.1< 2026.2.1 affected
12.0< 12.12.1 affected
12.0< 12.11.9 affected
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I. Basic Information for CVE-2026-13728

Vulnerability Information
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Vulnerability Title
WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database
Source: CVE Program / CVE List V5
Vulnerability Description
In exception circumstances, WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal resources. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5
Vulnerability Title
WatchGuard Fireware OS 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WatchGuard Fireware OS是美国WatchGuard公司的一款网络防火墙的操作系统。 WatchGuard Fireware OS 12.1及之前版本和2025.1及之前版本存在信任管理问题漏洞，该漏洞源于使用硬编码加密密钥加密Access Portal资源保存的凭据，可能导致凭据信息泄露。以下版本受到影响：12.1至12.12版本和2025.1至2026.2版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WatchGuard Fireware OS 2025.1 ~ 2026.2.1 -
WatchGuard Fireware OS 12.0 ~ 12.11.9 -

II. Public POCs for CVE-2026-13728

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III. Intelligence Information for CVE-2026-13728

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Vendor Advisories for CVE-2026-13728 (2)

Same Patch Batch · WatchGuard · 2026-07-02 · 17 CVEs total

CVE-2026-13368 9.2 CRITICAL WatchGuard Firebox Race Condition and Use-After-Free in Mobile VPN with IKEv2 LDAP Authent
CVE-2026-13084 8.7 HIGH Null Pointer Dereference in WatchGuard Fireware OS iked Process
CVE-2026-13722 8.6 HIGH WatchGuard Firebox Firmware Image Validation Bypass in WatchGuard Fireware OS
CVE-2026-13383 8.6 HIGH WatchGuard Firebox ikestubd Out of Bounds Write Vulnerability
CVE-2026-13053 8.6 HIGH WatchGuard Firebox Authenticated Out of Bounds Write in Management CLI Command Handler
CVE-2026-13050 8.6 HIGH WatchGuard Firebox networkd Out of Bounds Write Vulnerability
CVE-2026-13054 8.6 HIGH WatchGuard Firebox Arbitrary File Write via Path Traversal in Management Web UI
CVE-2026-13384 8.6 HIGH WatchGuard Firebox wgagent Out of Bounds Write Vulnerability
CVE-2026-8247 7.7 HIGH WatchGuard Firebox admd Out of Bounds Write Vulnerability
CVE-2026-13079 7.3 HIGH WatchGuard Mobile VPN with SSL Windows Client Local Privilege Escalation
CVE-2026-13371 6.9 MEDIUM WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
CVE-2026-13377 4.8 MEDIUM WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy Configurat
CVE-2026-13373 4.8 MEDIUM WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Tigerpaw Technology
CVE-2026-13376 4.8 MEDIUM WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in spamBlocker Module
CVE-2026-13375 4.8 MEDIUM WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Autotask Technology
CVE-2026-13374 4.8 MEDIUM WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in ConnectWise Technolo

IV. Related Vulnerabilities

Same product: Fireware OS
Same vendor: WatchGuard
Same weakness: CWE-798

V. Comments for CVE-2026-13728

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