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CVE-2025-14733

WatchGuard Firebox iked Out of Bounds Write Vulnerability

  • Critical 9.3
  • Exploited: added to CISA KEV 19 Dec 2025
  • Used in ransomware campaigns

Description

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.

Key facts

Published
19 Dec 2025
Last changed
9 Sep 2026
Assigned by
WatchGuard
KEV added
19 Dec 2025
KEV fix due
26 Dec 2025
Used in ransomware
Yes, according to CISA
EPSS
29.423% likely to be exploited in the next 30 days, higher than 98.21% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.3CVSS 4.0, Criticalfrom the CNA (WatchGuard)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/U:Red

What to do

  • Fireware OS 2025.1.4, Fireware OS 12.11.6, Fireware OS 12.5.15, Fireware OS 12.3.1-b728352 In addition to installing the latest Fireware OS that contains the fix, administrators that have confirmed threat actor activity on their Firebox appliances must take precautions to rotate all locally stored secrets on vulnerable Firebox appliances as described in our Best Practices to Rotate Shared Secrets Stored on the Firebox knowledge base article (https://techsearch.watchguard.com/KB?type=Article&SFDCID=kA1Vr000000DNMzKAO&lang=en_US).CNA solution statement
  • If your Firebox is only configured with Branch Office VPN tunnels to static gateway peers and you are not able to immediately upgrade the device to a version of Fireware OS with the vulnerability resolution, you can follow WatchGuard’s recommendations for Secure Access to Branch Office VPNs that Use IPSec and IKEv2 (https://techsearch.watchguard.com/KB?type=Article&SFDCID=kA1Vr000000DMXNKA4&lang=en_US) as a temporary workaround.CNA workaround statement
  • Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
WatchGuardFireware OS
  • Default status: unaffected
  • 2025.1 up to but excluding 2025.1.4 (affected)
  • 12.0 up to but excluding 12.11.6 (affected)
  • 11.10.2 up to and including 11.12.4+541730 (affected)
WatchGuardFireware OS
  • Default status: unaffected
  • 12.0 up to but excluding 12.3.1+728352 (affected)
WatchGuardFireware OS
  • Default status: unaffected
  • 12.0 up to but excluding 12.5.15 (affected)

Timeline

  1. 19 Dec 2025 CVE-2025-14733 added to CISA KEV
  2. 19 Dec 2025 Added to the CISA KEV catalogue
  3. 19 Dec 2025 Published

Weakness

References