CVE-2026-13383
Authenticated attacker can execute arbitrary code via crafted Web UI requests.
Is CVE-2026-13383 being exploited?
Not confirmed. CVE-2026-13383 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.72% probability of exploitation in the next 30 days.
How severe is CVE-2026-13383?
CVE-2026-13383 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-13383?
Yes. A fix has been recorded for CVE-2026-13383. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-13383 affect?
CVE-2026-13383 affects WatchGuard Fireware OS 12.1-12.12, WatchGuard Fireware OS 2025.1-2026.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-13383?
Apply vendor patch; restrict Management UI access; enable MFA; monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Privilege escalation to admin; arbitrary code execution on Fireware device via Management Web UI.
Patch when possible
- affected>= 2025.1 and < 2026.2.1
- affected>= 12.1 and < 12.12.1
- affected>= 12.1 and < 12.11.9
- affected>= 12.1 and < 12.5.19
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.