CVE-2026-111107
Fireware OS NULL Pointer Dereference in Management Interface Allows Unauthenticated Denial of Service
A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface allows a remote, unauthenticated attacker with network access to the management interface to crash the management service by sending a specially crafted login request. Repeated exploitation terminates all active administrator sessions and in-progress management operations and can prevent management of the device. Traffic processing is not affected.
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 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-2026-111107CNA: 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.