What is CVE-2025-12026?

CVE-2025-12026 is a high-severity vulnerability in Watchguard Fireboxcloud, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2025-12-04.

How severe is CVE-2025-12026?

High severity. CVSS v3 base score is 7.2 out of 10.

Buffer overflow in Watchguard Fireboxcloud

CVE-2025-12026

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS’s certificate request command could allow an authenticated privileged user to execute arbitrary code via specially crafted CLI commands.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (31.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Watchguard Fireboxcloud
Watchguard Firebox_m270
Watchguard Firebox_m290
Watchguard Firebox_m370
Watchguard Firebox_m390
Watchguard Firebox_m440
Watchguard Firebox_m4600
Watchguard Firebox_m470
Watchguard Firebox_m4800
Watchguard Firebox_m5600

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2025-12026?: CVE-2025-12026 is a high-severity vulnerability in Watchguard Fireboxcloud, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2025-12-04.
How severe is CVE-2025-12026?: High severity. CVSS v3 base score is 7.2 out of 10.