Exploited CVEs / CVE-2022-26318
CVE-2022-26318
WatchGuard Firebox and XTM Appliances Arbitrary Code Execution. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-04-15 (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 and XTM Appliances vulnerability, Critical severity, CVSS v3 9.8. Added to the CISA KEV catalog 2022-03-25.
Senserva AI Opinion for CVE-2022-26318
Unlike its sibling privilege escalation bug, this WatchGuard Firebox and XTM flaw needs no credentials at all: an unauthenticated attacker can execute arbitrary code on the appliance, Critical Severity at CVSS 9.8 with a high 78% EPSS score. Confirmed exploitation (KEV, 2022-03-25) against edge security devices means opportunistic scanners are actively looking for these. Small and mid-size networks that deploy Firebox at the perimeter and rarely update firmware are the typical victims.
Do this: Update Firebox and XTM firmware now and check appliance logs and configs for changes you did not make.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2022-26318
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2022-26318
- Published
- 2022-03-25
- Last revised
- 2022-03-25
- 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.
- 2022-03-25 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 78.3%
- 2026-08-02 EPSS 78.3% to 78.2%
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: 2022-04-15 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2022-26318
Check the vendor's security advisory channel for the patched Firebox and XTM Appliances versions and workarounds.
Common questions about CVE-2022-26318
Is CVE-2022-26318 actively exploited?
Yes. CVE-2022-26318 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 78%.
What is the CISA deadline and required action for CVE-2022-26318?
CISA set the federal (BOD 22-01) remediation due date at 2022-04-15, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2022-26318?
Check the vendor's security advisory for the patched Firebox and XTM Appliances 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-2022-26318?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2022-26318'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.