CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-4266

An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that do not support the Access Portal feature, including the T15 and T35.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.003

EPSS Ranking 19.3%

CVSS Severity

CVSS v3 Score 6.7

References

Products affected by CVE-2026-4266

Watchguard » Firebox Cloud » Version: N/A

cpe:2.3:a:watchguard:firebox_cloud:-
Watchguard » Firebox M270 » Version: N/A

cpe:2.3:h:watchguard:firebox_m270:-
Watchguard » Firebox M290 » Version: N/A

cpe:2.3:h:watchguard:firebox_m290:-
Watchguard » Firebox M295 » Version: N/A

cpe:2.3:h:watchguard:firebox_m295:-
Watchguard » Firebox M370 » Version: N/A

cpe:2.3:h:watchguard:firebox_m370:-
Watchguard » Firebox M390 » Version: N/A

cpe:2.3:h:watchguard:firebox_m390:-
Watchguard » Firebox M395 » Version: N/A

cpe:2.3:h:watchguard:firebox_m395:-
Watchguard » Firebox M440 » Version: N/A

cpe:2.3:h:watchguard:firebox_m440:-
Watchguard » Firebox M4600 » Version: N/A

cpe:2.3:h:watchguard:firebox_m4600:-
Watchguard » Firebox M470 » Version: N/A

cpe:2.3:h:watchguard:firebox_m470:-
Watchguard » Firebox M4800 » Version: N/A

cpe:2.3:h:watchguard:firebox_m4800:-
Watchguard » Firebox M495 » Version: N/A

cpe:2.3:h:watchguard:firebox_m495:-
Watchguard » Firebox M5600 » Version: N/A

cpe:2.3:h:watchguard:firebox_m5600:-
Watchguard » Firebox M570 » Version: N/A

cpe:2.3:h:watchguard:firebox_m570:-
Watchguard » Firebox M5800 » Version: N/A

cpe:2.3:h:watchguard:firebox_m5800:-
Watchguard » Firebox M590 » Version: N/A

cpe:2.3:h:watchguard:firebox_m590:-
Watchguard » Firebox M595 » Version: N/A

cpe:2.3:h:watchguard:firebox_m595:-
Watchguard » Firebox M670 » Version: N/A

cpe:2.3:h:watchguard:firebox_m670:-
Watchguard » Firebox M690 » Version: N/A

cpe:2.3:h:watchguard:firebox_m690:-
Watchguard » Firebox M695 » Version: N/A

cpe:2.3:h:watchguard:firebox_m695:-
Watchguard » Firebox Nv5 » Version: N/A

cpe:2.3:h:watchguard:firebox_nv5:-
Watchguard » Firebox T115-W » Version: N/A

cpe:2.3:h:watchguard:firebox_t115-w:-
Watchguard » Firebox T125-W » Version: N/A

cpe:2.3:h:watchguard:firebox_t125-w:-
Watchguard » Firebox T125 » Version: N/A

cpe:2.3:h:watchguard:firebox_t125:-
Watchguard » Firebox T145-W » Version: N/A

cpe:2.3:h:watchguard:firebox_t145-w:-
Watchguard » Firebox T145 » Version: N/A

cpe:2.3:h:watchguard:firebox_t145:-
Watchguard » Firebox T185 » Version: N/A

cpe:2.3:h:watchguard:firebox_t185:-
Watchguard » Firebox T20 » Version: N/A

cpe:2.3:h:watchguard:firebox_t20:-
Watchguard » Firebox T25 » Version: N/A

cpe:2.3:h:watchguard:firebox_t25:-
Watchguard » Firebox T40 » Version: N/A

cpe:2.3:h:watchguard:firebox_t40:-
Watchguard » Firebox T45 » Version: N/A

cpe:2.3:h:watchguard:firebox_t45:-
Watchguard » Firebox T55 » Version: N/A

cpe:2.3:h:watchguard:firebox_t55:-
Watchguard » Firebox T70 » Version: N/A

cpe:2.3:h:watchguard:firebox_t70:-
Watchguard » Firebox T80 » Version: N/A

cpe:2.3:h:watchguard:firebox_t80:-
Watchguard » Firebox T85 » Version: N/A

cpe:2.3:h:watchguard:firebox_t85:-
Watchguard » Fireboxv » Version: N/A

cpe:2.3:h:watchguard:fireboxv:-
Watchguard » Fireware » Version: 12.1

cpe:2.3:o:watchguard:fireware:12.1
Watchguard » Fireware » Version: 12.1.1

cpe:2.3:o:watchguard:fireware:12.1.1
Watchguard » Fireware » Version: 12.1.3

cpe:2.3:o:watchguard:fireware:12.1.3
Watchguard » Fireware » Version: 12.1.4

cpe:2.3:o:watchguard:fireware:12.1.4
Watchguard » Fireware » Version: 12.10

cpe:2.3:o:watchguard:fireware:12.10
Watchguard » Fireware » Version: 12.10.1

cpe:2.3:o:watchguard:fireware:12.10.1
Watchguard » Fireware » Version: 12.10.2

cpe:2.3:o:watchguard:fireware:12.10.2
Watchguard » Fireware » Version: 12.10.3

cpe:2.3:o:watchguard:fireware:12.10.3
Watchguard » Fireware » Version: 12.10.4

cpe:2.3:o:watchguard:fireware:12.10.4
Watchguard » Fireware » Version: 12.11

cpe:2.3:o:watchguard:fireware:12.11
Watchguard » Fireware » Version: 12.11.1

cpe:2.3:o:watchguard:fireware:12.11.1
Watchguard » Fireware » Version: 12.11.2

cpe:2.3:o:watchguard:fireware:12.11.2
Watchguard » Fireware » Version: 12.11.3

cpe:2.3:o:watchguard:fireware:12.11.3
Watchguard » Fireware » Version: 12.11.4

cpe:2.3:o:watchguard:fireware:12.11.4
Watchguard » Fireware » Version: 12.11.5

cpe:2.3:o:watchguard:fireware:12.11.5
Watchguard » Fireware » Version: 12.11.6

cpe:2.3:o:watchguard:fireware:12.11.6
Watchguard » Fireware » Version: 12.2.0

cpe:2.3:o:watchguard:fireware:12.2.0
Watchguard » Fireware » Version: 12.2.1

cpe:2.3:o:watchguard:fireware:12.2.1
Watchguard » Fireware » Version: 12.3

cpe:2.3:o:watchguard:fireware:12.3
Watchguard » Fireware » Version: 12.3.1

cpe:2.3:o:watchguard:fireware:12.3.1
Watchguard » Fireware » Version: 12.4

cpe:2.3:o:watchguard:fireware:12.4
Watchguard » Fireware » Version: 12.4.1

cpe:2.3:o:watchguard:fireware:12.4.1
Watchguard » Fireware » Version: 12.5

cpe:2.3:o:watchguard:fireware:12.5
Watchguard » Fireware » Version: 12.5.1

cpe:2.3:o:watchguard:fireware:12.5.1
Watchguard » Fireware » Version: 12.5.10

cpe:2.3:o:watchguard:fireware:12.5.10
Watchguard » Fireware » Version: 12.5.11

cpe:2.3:o:watchguard:fireware:12.5.11
Watchguard » Fireware » Version: 12.5.12

cpe:2.3:o:watchguard:fireware:12.5.12
Watchguard » Fireware » Version: 12.5.13

cpe:2.3:o:watchguard:fireware:12.5.13
Watchguard » Fireware » Version: 12.5.14

cpe:2.3:o:watchguard:fireware:12.5.14
Watchguard » Fireware » Version: 12.5.15

cpe:2.3:o:watchguard:fireware:12.5.15
Watchguard » Fireware » Version: 12.5.2

cpe:2.3:o:watchguard:fireware:12.5.2
Watchguard » Fireware » Version: 12.5.3

cpe:2.3:o:watchguard:fireware:12.5.3
Watchguard » Fireware » Version: 12.5.4

cpe:2.3:o:watchguard:fireware:12.5.4
Watchguard » Fireware » Version: 12.5.5

cpe:2.3:o:watchguard:fireware:12.5.5
Watchguard » Fireware » Version: 12.5.6

cpe:2.3:o:watchguard:fireware:12.5.6
Watchguard » Fireware » Version: 12.5.7

cpe:2.3:o:watchguard:fireware:12.5.7
Watchguard » Fireware » Version: 12.5.8

cpe:2.3:o:watchguard:fireware:12.5.8
Watchguard » Fireware » Version: 12.5.9

cpe:2.3:o:watchguard:fireware:12.5.9
Watchguard » Fireware » Version: 12.6.1

cpe:2.3:o:watchguard:fireware:12.6.1
Watchguard » Fireware » Version: 12.6.3

cpe:2.3:o:watchguard:fireware:12.6.3
Watchguard » Fireware » Version: 12.6.4

cpe:2.3:o:watchguard:fireware:12.6.4
Watchguard » Fireware » Version: 12.7.0

cpe:2.3:o:watchguard:fireware:12.7.0
Watchguard » Fireware » Version: 12.7.1

cpe:2.3:o:watchguard:fireware:12.7.1
Watchguard » Fireware » Version: 12.7.2

cpe:2.3:o:watchguard:fireware:12.7.2
Watchguard » Fireware » Version: 12.8.0

cpe:2.3:o:watchguard:fireware:12.8.0
Watchguard » Fireware » Version: 12.8.1

cpe:2.3:o:watchguard:fireware:12.8.1
Watchguard » Fireware » Version: 12.8.2

cpe:2.3:o:watchguard:fireware:12.8.2
Watchguard » Fireware » Version: 12.8.3

cpe:2.3:o:watchguard:fireware:12.8.3
Watchguard » Fireware » Version: 12.9

cpe:2.3:o:watchguard:fireware:12.9
Watchguard » Fireware » Version: 12.9.2

cpe:2.3:o:watchguard:fireware:12.9.2
Watchguard » Fireware » Version: 12.9.3

cpe:2.3:o:watchguard:fireware:12.9.3
Watchguard » Fireware » Version: 12.9.4

cpe:2.3:o:watchguard:fireware:12.9.4
Watchguard » Fireware » Version: 2025.1

cpe:2.3:o:watchguard:fireware:2025.1
Watchguard » Fireware » Version: 2025.1.1

cpe:2.3:o:watchguard:fireware:2025.1.1
Watchguard » Fireware » Version: 2025.1.2

cpe:2.3:o:watchguard:fireware:2025.1.2
Watchguard » Fireware » Version: 2025.1.3

cpe:2.3:o:watchguard:fireware:2025.1.3
Watchguard » Fireware » Version: 2025.1.4

cpe:2.3:o:watchguard:fireware:2025.1.4

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-4266

Products

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