5357 Hacktricks: Port

If the server responds with Requested Range Not Satisfiable , the system may be vulnerable or sensitive to the exploit payload. C. SSRF and Relay Attacks

5357/tcp open http Microsoft HTTPAPI httpd 2.0 |_http-title: Service Unavailable |_http-server-header: Microsoft-HTTPAPI/2.0

: By interacting with WSD, an attacker might identify other vulnerable devices on the subnet that wouldn't otherwise be visible through standard scanning. Practical Assessment Steps

Port 5357 itself does not frequently suffer from direct remote code execution (RCE) flaws. However, it is an essential piece of a broader lateral movement strategy. Information Disclosure

While modern Windows versions are more secure, port 5357 has historically been associated with: port 5357 hacktricks

If the service requires authentication or can be forced to authenticate back to an attacker-controlled machine, it can be abused in NTLM relay operations.

The primary service associated with port 5357/tcp is . This is a Microsoft implementation of the Web Services Dynamic Discovery (WS-Discovery) protocol.

Because the service relies on the Windows http.sys driver to handle HTTP requests, it is susceptible to any core OS vulnerabilities affecting that driver.

WSDAPI is Microsoft's implementation of the standard. It allows devices to broadcast their presence and capabilities on a local network using a "plug-and-play" approach without needing manual driver configuration. Communication itself is carried over standard HTTP, which is why the service presents as a web server when you connect to it. If the server responds with Requested Range Not

Typical reconnaissance and exploitation techniques

A standard version scan will often reveal the underlying HTTP server. nmap -sV -p 5357 Use code with caution. Copied to clipboard

Since it is HTTP-based, you can try accessing it directly in a browser:

Protecting systems against exploitation of port 5357 involves a multi-layered approach. Practical Assessment Steps Port 5357 itself does not

While WSD is a convenient feature for local networks, it is often overlooked in security assessments. When left exposed or misconfigured, port 5357 can become a significant attack vector, leading to information disclosure, lateral movement, and even remote code execution.

The investigation concluded with a reminder: even the most convenient "plug-and-play" features can become an open door if left unmonitored.

simply by sending a message with a "specially crafted" long header. Though patched years ago, this specific port remains a subtle marker of a machine's network discovery configuration, often accessible if the Windows Firewall is set to anything other than "Public". To secure the network, the analyst recommended: Filtering access

A realistic posture Port 5357 embodies a recurring tension in network design: usability-driven discovery vs. the discipline of minimal exposure. In well-run environments, WSD should be an intentional, confined capability: limited to specific subnets, disabled where unnecessary, and logged where used. In under-managed networks it’s a low-effort reconnaissance jackpot for attackers who can already reach local subnets or who can trick users/devices into interacting with malicious peers.

You can interact with the port using curl to analyze the response headers and look for default paths. curl -i http:// :5357/ Use code with caution.