CVE-2025-12026

WatchGuard Firebox Authenticated Out of Bounds Write in certd

HIGH

7.2

CVSS Score

Published: December 4, 2025 at 09:43 PM UTC

Updated: August 10, 2026 at 04:38 PM UTC

34 products affected across 1 vendorFirewareFirebox T55Firebox M4800

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Severity

HIGH7.2

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

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.This vulnerability affects Fireware OS 12.0 up to and including 12.11.4, 12.5 up to and including 12.5.13, and 2025.1 up to and including 2025.1.2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fireware · WatchGuard

95%

12.0 ≤ v ≤ 12.11.512.0 ≤ v < 12.5.1412.0.0 ≤ v < 12.11.512.5 ≤ v < 12.5.142025.1 ≤ v < 2025.1.312.0 2025.1

Affected range stops below 12.11.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.5.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 2025.1.3, so it looks safe — our inference, not a vendor statement

watchguard-firebox-m270 (environment) · watchguard-firebox-m290 (environment) · watchguard-firebox-m370 (environment) · watchguard-firebox-m390 (environment) · watchguard-firebox-m440 (environment) · watchguard-firebox-m4600 (environment) · watchguard-firebox-m470 (environment) · watchguard-firebox-m4800 (environment) · watchguard-firebox-m5600 (environment) · watchguard-firebox-m570 (environment) · watchguard-firebox-m5800 (environment) · watchguard-firebox-m590 (environment) · watchguard-firebox-m670 (environment) · watchguard-firebox-m690 (environment) · watchguard-firebox-nv5 (environment) · watchguard-firebox-t115-w (environment) · watchguard-firebox-t125 (environment) · watchguard-firebox-t125-w (environment) · watchguard-firebox-t145 (environment) · watchguard-firebox-t145-w (environment) · watchguard-firebox-t15 (environment) · watchguard-firebox-t185 (environment) · watchguard-firebox-t20 (environment) · watchguard-firebox-t25 (environment) · watchguard-firebox-t35 (environment) · watchguard-firebox-t40 (environment) · watchguard-firebox-t45 (environment) · watchguard-firebox-t55 (environment) · watchguard-firebox-t70 (environment) · watchguard-firebox-t80 (environment) · watchguard-firebox-t85 (environment) · watchguard-fireboxcloud (environment) · watchguard-fireboxv (environment)

Firebox M270 · WatchGuarddevice

80%

All versions

Firebox M290 · WatchGuarddevice

80%

All versions

Firebox M370 · WatchGuarddevice

80%

All versions

Firebox M390 · WatchGuarddevice

80%

All versions