CVE-2025-14733
WatchGuard Firebox Out of Bounds Write Vulnerability - [Actively Exploited]
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 12.11.5 and 2025.1 up to and including 2025.1.3.
INFO
Published Date :
Dec. 19, 2025, 1:16 a.m.
Last Modified :
Dec. 19, 2025, 7:15 p.m.
Remotely Exploit :
Yes !
Source :
5d1c2695-1a31-4499-88ae-e847036fd7e3
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
WatchGuard Fireware OS iked process contains an out of bounds write vulnerability in the OS iked process. This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Check for signs of potential compromise on all internet accessible instances after applying mitigations. For more information please see: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027 ; https://nvd.nist.gov/vuln/detail/CVE-2025-14733
Affected Products
The following products are affected by CVE-2025-14733
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 5d1c2695-1a31-4499-88ae-e847036fd7e3 | ||||
| CVSS 4.0 | CRITICAL | 5d1c2695-1a31-4499-88ae-e847036fd7e3 |
Solution
- Update Fireware OS to a non-vulnerable version.
- Apply the latest security patches from WatchGuard.
- Reconfigure affected VPN settings if needed.
Public PoC/Exploit Available at Github
CVE-2025-14733 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-14733.
| URL | Resource |
|---|---|
| https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027 | Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14733 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-14733 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-14733
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2025-14733
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-14733 vulnerability anywhere in the article.
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TheCyberThrone
CVE-2025-14733: Critical WatchGuard Firebox RCE Actively Exploited
OverviewCVE-2025-14733 is a critical remote code execution (RCE) vulnerability in WatchGuard Fireware OS that allows unauthenticated attackers to take over Firebox firewall appliances via IKEv2 VPN fu ... Read more
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security.nl
WatchGuard waarschuwt voor actief misbruikt beveiligingslek in firewalls
Firewall-leverancier WatchGuard waarschuwt voor een actief misbruikte kwetsbaarheid in de firewalls die het levert. Er zijn gisteren beveiligingsupdates uitgebracht om het probleem te verhelpen. Sinds ... Read more
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The Hacker News
WatchGuard Warns of Active Exploitation of Critical Fireware OS VPN Vulnerability
Dec 19, 2025Ravie LakshmananVulnerability / Network Security WatchGuard has released fixes to address a critical security flaw in Fireware OS that it said has been exploited in real-world attacks. T ... Read more
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BleepingComputer
New critical WatchGuard Firebox firewall flaw exploited in attacks
WatchGuard has warned customers to patch a critical, actively exploited remote code execution (RCE) vulnerability in its Firebox firewalls. Tracked as CVE-2025-14733, this security flaw affects firewa ... Read more
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CybersecurityNews
WatchGuard 0-day Vulnerability Exploited in the Wild to Hijack Firewalls
An urgent security update has been released to fix a critical zero-day vulnerability in WatchGuard Firebox firewalls. With warnings that hackers are already actively exploiting the flaw in the wild to ... Read more
The following table lists the changes that have been made to the
CVE-2025-14733 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Dec. 19, 2025
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14733 -
Initial Analysis by [email protected]
Dec. 19, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* versions from (including) 11.10.2 up to (excluding) 12.5.15 OR cpe:2.3:h:watchguard:firebox_t15:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t35:*:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* versions from (including) 11.10.2 up to (excluding) 12.11.6 OR 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:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m4800:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m5600:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m570:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m5800:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m590:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m670:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_m690:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_nv5:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t20:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t25:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t40:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t45:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t55:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t70:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t80:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t85:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:fireboxcloud:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:fireboxv:*:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* versions from (including) 2025.1 up to (excluding) 2025.1.4 OR cpe:2.3:h:watchguard:firebox_t115-w:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t125:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t125-w:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t145:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t145-w:*:*:*:*:*:*:*:* cpe:2.3:h:watchguard:firebox_t185:*:*:*:*:*:*:*:* Added Reference Type WatchGuard Technologies, Inc.: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027 Types: Vendor Advisory -
New CVE Received by 5d1c2695-1a31-4499-88ae-e847036fd7e3
Dec. 19, 2025
Action Type Old Value New Value Added 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 12.11.5 and 2025.1 up to and including 2025.1.3. Added CVSS V4.0 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:Red Added CWE CWE-787 Added Reference https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027