Description
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.
Affected products
watchguard: fireware; 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; watchguard: firebox m570; watchguard: firebox m5800; watchguard: firebox m590; watchguard: firebox m670; watchguard: firebox m690
References2
Metrics
- CVSS 3.1
-
4.9
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - CVSS 4.0
-
6.9
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 25 · as of 12 November 2026
- CWE
- CWE-440
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.