WatchGuard flaws being used in attacks

CISA lists 4 flaws in WatchGuard products as being used in attacks, most recently on 19 Dec 2025. 1 has been used in ransomware.

What to do

1. Update every WatchGuard product you use.Install the updates WatchGuard offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksUsed in ransomwareAdded by CISA on 19 Dec 2025
   WatchGuard Firebox
   CVE-2025-14733WatchGuard Firebox Out of Bounds Write Vulnerability
   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.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 12 Nov 2025
   WatchGuard Firebox
   CVE-2025-9242WatchGuard Firebox Out-of-Bounds Write Vulnerability
   WatchGuard Firebox contains an out-of-bounds write vulnerability in the OS iked process that may allow a remote unauthenticated attacker to execute arbitrary code.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 11 Apr 2022
   WatchGuard Firebox and XTM
   CVE-2022-23176WatchGuard Firebox and XTM Privilege Escalation Vulnerability
   WatchGuard Firebox and XTM appliances allow a remote attacker with unprivileged credentials to access the system with a privileged management session via exposed management access.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
4. Being used in attacksAdded by CISA on 25 Mar 2022
   WatchGuard Firebox and XTM Appliances
   CVE-2022-26318WatchGuard Firebox and XTM Appliances Arbitrary Code Execution
   On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. WatchGuard on CISA’s site.