CVE-2026-3987 — WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI

CVE-2026-3987

WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI PUBLISHED

Description (CNA)

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2025.1 before 2026.2; affected 12.6.1 before 12.12

CWE

CWE-22

References

https://psirt.watchguard.com/CVE-2026-3987
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00009

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.