CVE-2025-9242WatchGuard Firebox iked Out of Bounds Write Vulnerability

An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.

9.3 CRITICALEPSS 92.21%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-08-10 19:59 UTC

OverviewCVSS details

9.3CRITICALCVSS 4.0

Score source: WatchGuard (CNA)
NVD status: Analyzed
Published: Sep 17, 2025
Assigner: WatchGuard

Affected

Fireware OS (WatchGuard)

Versions: 11.0 through 11.12.4+541730 · 12.0 before 12.11.4
Fixed in: 12.11.4, 2025.1.1

+2 more products →

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Nov 12, 2025
KEV due date: Dec 3, 2025
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

92.21%chance of exploitation in 30 days

Higher than 99.82% of CVEs

CVSS 4.0 · WatchGuard (CNA)

9.3Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: High
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.3	CRITICAL	4.0WatchGuard (CNA)	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA required action

⚡ Known exploited · remediation due Dec 3, 2025

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2025-9242
Status: Analyzed
Assigner (CNA): WatchGuard
Published: Sep 17, 2025
Last modified: 2026-08-10 19:59 UTC
Weaknesses: CWE-787

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 10:38 UTC.