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Vulnerabilities/CVE-2026-13084Public Intelligence Dossier
Source: watchguard · Limited verification•Last verified: •Collection Degraded
CVE-2026-13084Unknown / EvaluatingHIGH (raw)CVSS 8.7CWE-476

A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages

Published: 03 Jul 2026•Last updated: 26 Oct 2026, 02:40 AM IST•Source identifier: 5d1c2695-1a31-4499-88ae-e847036fd7e3
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
8.7HIGH (raw)
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
Metric source5d1c2695-1a31-4499-88ae-e847036fd7e3
EPSS probability
0.6%0.006
Percentile49th
Weakness type
CWE-476
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2

SOC priority

High

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; HIGH severity; Source severity; no confirmed exploitation signal

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • watchguard fireware · >= 12.5 < 12.5.19; >= 11.0.0 < 11.12.4; 11.12.4; >= 12.0 < 12.12.1; >= 2025.1 < 2026.2.1 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:watchguard:firebox_t15:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_t35:-:*:*:*:*:*:*:*, cpe:2.3:a:watchguard:firebox_cloud:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched network-unauthenticated (CVSS AV:N, CVSS PR:N, CVSS UI:N)

Exposure

  1. Identify devices reporting this CVE and note which expose the affected service to untrusted networks.Telemetry: DeviceTvmSoftwareVulnerabilities · A network-reachable, no-privilege vector makes internet-facing instances the first exposure question. · Rule network-unauthenticated

Exploitation evidence

  1. Review inbound connections to the affected service from unexpected sources since the advisory date.Telemetry: DeviceNetworkEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule network-unauthenticated

Response

  1. Confirm the source-stated update is installed and the CVE is no longer reported.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies remediation. · Rule network-unauthenticated

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
5d1c2695-1a31-4499-88ae-e847036fd7e3
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_t15:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_t35:-:*:*:*:*:*:*:*, cpe:2.3:o:watchguard:fireware:11.12.4:-:*:*:*:*:*:*, cpe:2.3:o:watchguard:fireware:11.12.4:u1:*:*:*:*:*:*, cpe:2.3:a:watchguard:firebox_cloud:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:*, cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:*

Evidence & Provenance

3 public sources
watchguard.comSource recordnvd.nist.govSource recordpsirt.watchguard.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-13084
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-13084
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-13084"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.