Exploited CVEs / CVE-2025-9242
CVE-2025-9242
WatchGuard Firebox Out-of-Bounds Write Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2025-12-03 (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 2025-11-12.
Senserva AI Opinion for CVE-2025-9242
The iked process in WatchGuard Firebox firewalls contains an out-of-bounds write reachable by remote unauthenticated attackers, meaning the VPN key exchange daemon itself is the attack surface. CVSS 9.8, an 86% EPSS score, and a November 2025 KEV listing put this among the most exposed perimeter flaws of the season, since IKE must be internet-reachable to do its job.
Do this: Update Firebox firmware today; if you cannot, disable the affected VPN configurations until you can.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-9242
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-9242
- Published
- 2025-11-12
- Last revised
- 2025-11-12
- Changes tracked
- 1
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.
Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.
- 2025-11-12 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 86.4%
- 2026-07-24 EPSS 86.4% to 91.1%
- 2026-08-11 EPSS 91.1% to 91.3%
- 2026-08-18 EPSS 91.3% to 91.3%
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: 2025-12-03 (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-2025-9242
Check the vendor's security advisory channel for the patched Firebox versions and workarounds.
Common questions about CVE-2025-9242
Is CVE-2025-9242 actively exploited?
Yes. CVE-2025-9242 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-11-12, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 91%.
What is the CISA deadline and required action for CVE-2025-9242?
CISA set the federal (BOD 22-01) remediation due date at 2025-12-03, 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-2025-9242?
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-2025-9242?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-9242'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.