CVE-2026-112709
Received
Received - Intake
Heap Overflow in Fireware OS Authentication Service
Vulnerability report for CVE-2026-112709, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-27
Last updated on: 2026-10-27
Assigner: WatchGuard Technologies, Inc.
Description
Description
A heap-based buffer overflow vulnerability in the Fireware OS authentication service allows an attacker who controls or intercepts traffic to the configured Active Directory server to create a denial of service condition and potentially execute arbitrary code by returning a specially crafted response.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| WatchGuard | Fireware OS | 2025.1 |
| WatchGuard | Fireware OS | 12.0 |
| WatchGuard | Fireware OS | 12.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
| CWE-131 | The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow. |
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
