CVE-2026-112710
Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code Execution
A heap-based buffer overflow vulnerability exists 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.
Fixes and workarounds
Fix
Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22
Source: CNA: WatchGuardAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Fireware OS WatchGuard Platforms: Default |
≥ 2025.1; < 2026.4 (affected, custom) ≥ 12.0; < 12.12.4 (affected, custom) Other versions: unaffected |
CNA: WatchGuard |
| Fireware OS WatchGuard Platforms: T15/T35 |
≥ 12.0; < 12.5.22 (affected, custom)
Other versions: unaffected |
CNA: WatchGuard |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 9.2 critical |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: WatchGuard |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://psirt.watchguard.com/CVE-2026-112710CNA: WatchGuard · vendor-advisory
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.