CVE-2026-103594Critical· 9.5▾ MidnightA 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 Servi…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 52.3 · likelihood 0 · exploitation 0
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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.
fireware_os >= 2026.2 < 2026.4fireware_os >= 12.12 < 12.12.4Fireware OS 2026.4, Fireware OS 12.12.4
Connected by shared product, vendor, weakness, or advisory.
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