Widely deployed firewall appliances; tampered firmware could disrupt network security and operations.
CVE-2026-13722
WatchGuard Fireware: backup image validation bypass enables tampered firmware by admin.
Is CVE-2026-13722 being exploited?
Not confirmed. CVE-2026-13722 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 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-13722?
CVE-2026-13722 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-2026-13722?
Yes. A fix has been recorded for CVE-2026-13722. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-13722 affect?
CVE-2026-13722 affects WatchGuard Fireware OS appliances (versions 11.0–11.12.4_Update1, 12.0–12.12, 2025.1–2025.6.2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-13722?
Patch when available; if not, restrict backup/restore and audit admin actions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated admin can install tampered firmware via backup/restore, risking full device compromise.
Patch when possible
- affected>= 2025.1 and < 2026.2.1
- affected>= 12.0 and < 12.12.1
- affected>= 11.0 and <= 11.12.4+541730
- affected>= 12.0 and < 12.11.9
- affected>= 12.0 and < *
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.