CVE-2026-93864

Fireware OS Link Following in firewalld Allows Local Arbitrary File Overwrite as Root

Published Oct 27, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and triggering a list update. Written content is partially constrained.

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': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and triggering a list update. Written content is partially constrained.
Title Fireware OS Link Following in firewalld Allows Local Arbitrary File Overwrite as Root
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-22
CWE-377
CWE-59
CWE-73
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H'}

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Oct 29, 2026, 10:45 AM
Reserved
Sep 18, 2026, 7:22 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 4:17 PM
Modified
Oct 29, 2026, 11:17 AM