CVE-2026-106173 Deep-Dive: FortiSIEM gRPC Path Traversal File Write RCE

Horizon3 researchers analyze CVE-2026-106173, a critical Fortinet FortiSIEM vulnerability affecting an unauthenticated gRPC service. The deep-dive explains how path traversal and null-byte handling enable arbitrary file writes and remote code execution, along with indicators of compromise for defenders.

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