CVE-2025-14733: in the CISA KEV catalogue

WatchGuard Firebox Out of Bounds Write Vulnerability. CISA added CVE-2025-14733 to the Known Exploited Vulnerabilities catalogue on 2025-12-19 with a default due date of 2025-12-26. Known ransomware campaign use: Known. Forensic triage flag: No.

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 description)

Vendor / product: WatchGuard Firebox
CWE: CWE-787
CISA 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.
EPSS: 29%, percentile 98 (scored 2026-11-04)

EPSS puts about 29 in 100 odds (29%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 98% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.

Vendor and reference links (from CISA)

Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.

Data dates. CISA KEV catalogue version 2026.11.04, released 2026-11-04, 1,768 entries (checked 2026-11-05). EPSS model v2026.06.15, scored 2026-11-04, 400,189 CVEs. Sources: CISA and FIRST (EPSS by FIRST; scores generated by Empirical Security). Copied to our own database and refreshed automatically; if a refresh fails, the previous copy keeps serving with its own date.

Frequently asked questions

Is CVE-2025-14733 in the CISA KEV catalogue?

Yes. CISA added CVE-2025-14733 (WatchGuard Firebox Out of Bounds Write Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2025-12-19. CISA's default due date for it is 2025-12-26.

Is CVE-2025-14733 used in ransomware attacks?

CISA marks known ransomware campaign use as Known for CVE-2025-14733.

What should I do about CVE-2025-14733?

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.

Sources

CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
NVD record for CVE-2025-14733