CVE-2025-14733

WatchGuard Firebox remote code execution, confirmed 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.

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29%chance of exploitation in the next 30 days (EPSS), 98th percentile

19 Decadded to CISA's Known Exploited Vulnerabilities list, 2025

26 Decfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	WatchGuard Firebox Out of Bounds Write Vulnerability
Vendor and product	WatchGuard · Firebox
Type	remote code execution · CWE-787
Exploited	Confirmed by CISA listed 19 December 2025
Likelihood	one of the most likely to be exploited of every vulnerability tracked
Deadline	26 December 2025 · already passed
Used in ransomware	Yes: CISA reports it used in ransomware campaigns
Advisories	www.watchguard.com ↗ · nvd.nist.gov ↗

What to do

Three steps, in this order

Step 1

Patch to the fixed version the vendor names, today if the product faces the internet.

Step 2

Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list.

Step 3

Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

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

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Questions

CVE-2025-14733 in short

Is CVE-2025-14733 being exploited?

Yes. CISA added CVE-2025-14733 to its Known Exploited Vulnerabilities catalogue on 19 December 2025, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2025-14733?

US federal agencies must remediate it by 26 December 2025. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2025-14733 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 29%, the 98th percentile of every CVE it scores.

How do I fix CVE-2025-14733?

Patch to the fixed version the vendor names, today if the product faces the internet. Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list. Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

Same vendor

Other WatchGuard vulnerabilities being exploited

CVE	Product	Type	Listed
CVE-2025-9242	Firebox	remote code execution	12 November 2025

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.