CVE-2025-9242

CRITICAL
2025-09-17 5d1c2695-1a31-4499-88ae-e847036fd7e3
9.3
CVSS 4.0
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CVSS Vector

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/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Analysis Generated
Mar 28, 2026 - 19:12 vuln.today
Added to CISA KEV
Nov 14, 2025 - 02:00 cisa
CISA KEV
PoC Detected
Nov 14, 2025 - 02:00 vuln.today
Public exploit code
CVE Published
Sep 17, 2025 - 08:15 nvd
CRITICAL 9.3

Tags

Memory Corruption Buffer Overflow Microsoft RCE Fireware

Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS 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.This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.3 and 2025.1.

Analysis

WatchGuard Fireware OS contains an out-of-bounds write in IKEv2 VPN handling enabling unauthenticated remote code execution on WatchGuard firewalls.

Technical Context

The CWE-787 OOB write in IKEv2 processing allows crafted VPN negotiation packets to corrupt memory and achieve code execution on the firewall.

Affected Products

['WatchGuard Fireware OS 11.10.2 through 11.10.12']

Remediation

Update Fireware OS. Disable IKEv2 VPN if not required. Monitor for exploitation indicators.

Priority Score

185
Low Medium High Critical
KEV: +50
EPSS: +69.0
CVSS: +46
POC: +20

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CVE-2025-9242 vulnerability details – vuln.today
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