Exploited CVEs / CVE-2025-14733
CVE-2025-14733
WatchGuard Firebox Out of Bounds Write Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2025-12-26 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Risk summary
Actively exploited WatchGuard Firebox vulnerability, Critical severity, CVSS v3 9.8. Added to the CISA KEV catalog 2025-12-19.
Senserva AI Opinion for CVE-2025-14733
WatchGuard Firebox firewalls can be compromised by a remote unauthenticated attacker through an out-of-bounds write in the iked process, affecting both mobile user VPN with IKEv2 and IKEv2 branch office VPN. It is rated Critical at CVSS 9.8 and has been confirmed exploited since 2025-12-19. VPN termination points must accept unsolicited internet traffic by design, so every Firebox running IKEv2 services is in the firing line.
Do this: Update Fireware OS on all Fireboxes using IKEv2 VPNs, and if one sat exposed unpatched, review its configuration for tampering.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-14733
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-14733
- Published
- 2025-12-19
- Last revised
- 2025-12-19
- Changes tracked
- 2
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CVE-2025-14733 was linked to ransomware activity on 2026-09-09: that is the drop-everything signal.
Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.
- 2025-12-19 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 18.1%
- 2026-07-19 EPSS 18.1% to 18.4%
- 2026-07-24 EPSS 18.4% to 21.8%
- 2026-08-07 EPSS 21.8% to 22.3%
- 2026-08-11 EPSS 22.3% to 26.2%
- 2026-08-16 EPSS 26.2% to 26.5%
- 2026-09-09 CVSS 9.8 to 0.0; linked to ransomware activity; CVSS 0.0 to 9.8
Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.
CISA required action
Federal (BOD 22-01) remediation due date: 2025-12-26 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2025-14733
Check the vendor's security advisory channel for the patched Firebox versions and workarounds.
Common questions about CVE-2025-14733
Is CVE-2025-14733 actively exploited?
Yes. CVE-2025-14733 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-12-19, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 27%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2025-14733?
CISA set the federal (BOD 22-01) remediation due date at 2025-12-26, which has passed; treat any unremediated system as overdue. The verbatim 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.
What fixes CVE-2025-14733?
Check the vendor's security advisory for the patched Firebox versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2025-14733?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-14733's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (morning and afternoon US Central).
Scope and sources
- More exploited WatchGuard CVEs
- Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.