Port 5357 Hacktricks 〈Direct Link〉

The page loaded, confirming her suspicion. Port 5357 was used by Windows for . It was a protocol designed to help devices find each other on a network—printers announcing their presence, laptops looking for scanners. But as HackTricks noted, it was often the Achilles' heel of lazy network configurations.

While HackTricks does not currently have a dedicated page for "Port 5357," it appears in general Windows enumeration checklists and involves the following risks:

While direct RCE via HTTPAPI is a major concern, port 5357 also facilitates other attack methods.

WSD provides a network "Plug and Play" experience. It allows a Windows computer to automatically detect and interact with a WSD-compatible printer as if it were connected via USB, without needing to install custom drivers or manually configure IP addresses. This is achieved through HTTP (port 5357), HTTPS (port 5358), and multicast discovery (UDP port 3702). port 5357 hacktricks

Disable the underlying services via Group Policy Object (GPO) or the services console: Stop and disable . Stop and disable Function Discovery Resource Publication .

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Port 5357 is typically associated with the , a Microsoft implementation of the WS-Discovery protocol. It allows devices like printers and scanners to be automatically discovered on a local network. The page loaded, confirming her suspicion

Keep WSD-enabled devices on a separate VLAN to limit the reach of an information leak.

If an administrative tool or a secondary network service triggers a WSD synchronization to a malicious path, the target machine will attempt an NTLM handshake, allowing you to capture or relay the hash. SSRF and Local Port Pivoting

HTTP/1.1 404 Not Found Content-Type: text/html; charset=us-ascii Server: Microsoft-HTTPAPI/2.0 Date: Wed, 03 Jun 2026 12:00:00 GMT Connection: close Content-Length: 315 Use code with caution. But as HackTricks noted, it was often the

: Devices send probe messages to locate services.

Port 5357 is not inherently malicious, but its presence provides several opportunities for an attacker to gain information about the network. A. Information Disclosure (Network Mapping) WSD can disclose sensitive device information, including:

Interacting directly with the root directory of port 5357 via web browsers or automated scripts like curl usually yields a default HTTP Error 503: The service is unavailable response. This is intended behavior; the endpoint expects explicit XML queries rather than standard browser requests.

Elena decided to press her luck. She modified her probe, attempting to spoof a request.