CVE-2026-13728
WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database
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 affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.
INFO
Published Date :
July 3, 2026, 12:16 a.m.
Last Modified :
July 9, 2026, 7:45 p.m.
Remotely Exploit :
Yes !
Source :
5d1c2695-1a31-4499-88ae-e847036fd7e3
Affected Products
The following products are affected by CVE-2026-13728
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 5d1c2695-1a31-4499-88ae-e847036fd7e3 | ||||
| CVSS 4.0 | MEDIUM | 5d1c2695-1a31-4499-88ae-e847036fd7e3 |
Solution
- Update Fireware OS to a non-vulnerable version.
- Ensure Access Portal feature is disabled if not needed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-13728.
| URL | Resource |
|---|---|
| https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-13728 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-13728
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-13728 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-13728 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration AND OR *cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* versions from (including) 12.1 up to (excluding) 12.12.1 OR cpe:2.3:h:watchguard:firebox_t55:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t70:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t20:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t40:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t80:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m570:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m670:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m590:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m690:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m4800:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m5800:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:fireboxcloud:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:fireboxv:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m5600:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_nv5:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t25:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t45:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t85:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* versions from (including) 2025.1 up to (excluding) 2026.2.1 OR cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t185:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m295:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m395:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m495:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m595:-:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m695:-:*:*:*:*:*:*:* Added Reference Type WatchGuard Technologies, Inc.: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 06, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-13728', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-06T14:55:52.147710Z'} -
New CVE Received by 5d1c2695-1a31-4499-88ae-e847036fd7e3
Jul. 03, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WatchGuard', 'product': 'Fireware OS', 'versions': [{'status': 'affected', 'version': '12.1', 'versionType': 'semver', 'lessThanOrEqual': '12.12'}, {'status': 'affected', 'version': '2025.1', 'versionType': 'semver', 'lessThanOrEqual': '2026.2'}], 'defaultStatus': 'unaffected'}] Added 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 affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-798 Added Reference https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025