VDB-337532 · CVE-2025-14733 · wgsa-2025-00027

WatchGuard Fireware OS up to 11.12.4+541730/12.5.14/12.11.5/2025.1.3 Mobile User VPN with IKEv2 out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in WatchGuard Fireware OS up to 11.12.4+541730/12.5.14/12.11.5/2025.1.3. It has been declared as critical. This affects an unknown function of the component Mobile User VPN with IKEv2. Such manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2025-14733. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in WatchGuard Fireware OS up to 11.12.4+541730/12.5.14/12.11.5/2025.1.3 (Firewall Software) and classified as very critical. Affected by this issue is some unknown processing of the component Mobile User VPN with IKEv2. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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 12.11.5 and 2025.1 up to and including 2025.1.3.

The advisory is shared for download at watchguard.com. This vulnerability is handled as CVE-2025-14733 since 12/15/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/19/2026).

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 279436 (WatchGuard Firebox OS 11.x / 12.x < 12.3.1_Update4 12.4.x < 12.5.15 / 12.6.x < 12.11.6 / 2025.x < 2025.1.4 Out of Bounds Write (CVE-2025-14733)), which helps to determine the existence of the flaw in a target environment. This issue was added on 12/19/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 12/26/2025:

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

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Zero-Day.cz (1061), Tenable (279436), EUVD (EUVD-2025-204437) and CERT Bund (WID-SEC-2025-2902). Once again VulDB remains the best source for vulnerability data.

Affected

WatchGuard Firebox

Productinfo

Type

Firewall Software

Vendor

WatchGuard

Name

Fireware OS

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.8

VulDB Base Score: 9.8
VulDB Temp Score: 9.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 279436
Nessus Name: WatchGuard Firebox OS 11.x / 12.x < 12.3.1_Update4 12.4.x < 12.5.15 / 12.6.x < 12.11.6 / 2025.x < 2025.1.4 Out of Bounds Write (CVE-2025-14733)

Zero-Day.cz: 🔒