What is CVE-2026-3344?

CVE-2026-3344 is a medium-severity vulnerability in Watchguard Fireboxcloud, classified under Expected Behavior Violation. CVSS score: 4.9/10. Published 2026-03-03.

How severe is CVE-2026-3344?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Watchguard Fireboxcloud

CVE-2026-3344

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.

EPSS: 0.003 (17.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

Affected products

Watchguard Fireboxcloud
Watchguard Firebox_m270
Watchguard Firebox_m290
Watchguard Firebox_m295
Watchguard Firebox_m370
Watchguard Firebox_m390
Watchguard Firebox_m395
Watchguard Firebox_m440
Watchguard Firebox_m4600
Watchguard Firebox_m470

Weakness classification (CWE)

CWE-440 — Expected Behavior Violation

References

5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory, Vendor Advisory)
5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory)

Frequently asked questions

What is CVE-2026-3344?: CVE-2026-3344 is a medium-severity vulnerability in Watchguard Fireboxcloud, classified under Expected Behavior Violation. CVSS score: 4.9/10. Published 2026-03-03.
How severe is CVE-2026-3344?: Medium severity. CVSS v3 base score is 4.9 out of 10.