CVE-2026-90464

Fireware OS Missing Command Validation allows Authenticated Arbitrary File Modification as Root

Published Oct 27, 2026 CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Description
An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel parameters with root privileges by submitting a specially crafted command. Written content is limited to numeric values.

Remediation

Vendor Solution

Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel parameters with root privileges by submitting a specially crafted command. Written content is limited to numeric values.
Title Fireware OS Missing Command Validation allows Authenticated Arbitrary File Modification as Root
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-59
CWE-73
CWE-732
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 7.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Nov 4, 2026, 8:26 PM
Reserved
Sep 11, 2026, 10:55 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 4:17 PM
Modified
Nov 4, 2026, 9:18 PM