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CVE Vulnerability Details :
CVE-2026-3987
PUBLISHED
More InfoOfficial Page
Assigner-WatchGuard
Assigner Org ID-5d1c2695-1a31-4499-88ae-e847036fd7e3
View Known Exploited Vulnerability (KEV) details
Published At-01 Apr, 2026 | 21:32
Updated At-03 Apr, 2026 | 03:55
Rejected At-
▼CVE Numbering Authority (CNA)
WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.This issue affects Fireware OS 12.6.1 up to and including 12.11.8 and 2025.1 up to and including 2026.1.2.

Affected Products
Vendor
WatchGuard Technologies, Inc.WatchGuard
Product
Fireware OS
Default Status
unaffected
Versions
Affected
  • From 12.6.1 through 12.11.8 (semver)
  • From 2025.1 through 2026.1.2 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-22CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Type: CWE
CWE ID: CWE-22
Description: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Metrics
VersionBase scoreBase severityVector
4.08.6HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 8.6
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-165CAPEC-165 File Manipulation
CAPEC ID: CAPEC-165
Description: CAPEC-165 File Manipulation
Solutions
Configurations
Workarounds
Exploits

WatchGuard is not aware of any exploitation of this issue in the wild.

Credits
finder
btaol
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00009
N/A
Hyperlink: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00009
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found