AI and data stack advisories

Severe, 6 weeks977Projects326

977 severe, 6 weeks · 326 projects

WatchGuard TechnologiesCVE-2026-103594

WatchGuard Technologies Fireware OS: stack buffer overflow

WatchGuard Technologies

CVE-2026-103594 · Published Oct 27, 2026 · updated Oct 28, 2026

Critical9.5
Fix: upgrade to 2026.4 or later (2 fixed versions below)
WatchGuard Technologies advisory

A stack-based buffer overflow vulnerability in Fireware OS's WireGuard configuration processing allows a remote attacker that has man-in-the-middle TLS-decrypted access between the Firebox and WatchGuard Cloud to create a Denial of Service condition and potentially execute arbitrary code by tampering with a FireCloud Gateway configuration payload.

Affected versions

PackageAffectedFixed in
Fireware OS
Product
>= 2026.2, < 2026.42026.4
>= 12.12, < 12.12.412.12.4
Details and references
CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-121, CWE-787, CWE-1284

More WatchGuard Technologies advisories

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