Fireware OS NULL Pointer Dereference in Management Interface Allows Unauthenticated Denial of Service

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-111107
StatePUBLISHED
AssignerWatchGuard
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 16:17:29 UTC
Updated2026-10-28 14:39:26 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from 5d1c2695-1a31-4499-88ae-e847036fd7e3

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-248 | CWE-476 | CWE-1286 | CWE-1286 CWE-1286 | CWE-248 CWE-248 | CWE-476 CWE-476

VersionSourceTypeScoreSeverityVector
4.05d1c2695-1a31-4499-88ae-e847036fd7e3Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WatchGuard Fireware OS affected 2025.1 2026.4 custom Default
CNA WatchGuard Fireware OS affected 12.0 12.12.4 custom Default
CNA WatchGuard Fireware OS affected 12.0 12.5.22 custom T15/T35

References

ReferenceSourceLinkTags
psirt.watchguard.com/CVE-2026-111107 5d1c2695-1a31-4499-88ae-e847036fd7e3 psirt.watchguard.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: WatchGuard AI Security Research (en)

Additional Advisory Data

Solutions

CNA: Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

Exploits

CNA: WatchGuard is not aware of any exploitation of this vulnerability in the wild.

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report