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CVE-2026-90464

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

HIGH
7.2
CVSS Score
Published: October 27, 2026 at 03:52 PM UTC
Updated: October 28, 2026 at 02:39 PM UTC
1 product affected across 1 vendorFireware

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Severity
HIGH7.2
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://psirt.watchguard.com/CVE-2026-90464

CVSS

7.2HIGHWatchGuard
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-59CWE-73CWE-732

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