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Detects attempts to exploit a deserialization vulnerability (CVE-2025-40553) in SolarWinds Web Help Desk. Attackers use non-standard hex escape sequences (e.g., `\xNN`) in JSON payloads to bypass security filters and achieve remote code execution.
Detects HTTP POST requests to the SolarWinds Web Help Desk (WHD) AjaxProxy endpoint that contain hex-encoded JSON keys or values (e.g., `\xNN`).
Attackers use this technique to bypass security filters and achieve remote code execution, as detailed in the exploit chain for CVE-2025-40552 and CVE-2025-40553.
Attackers use this technique to bypass security filters and achieve remote code execution, as detailed in the exploit chain for CVE-2025-40552 and CVE-2025-40553.
