Port - 5357 Hacktricks Fixed

Limit access exclusively to the local VLAN or administrative management subnets. 3. Regular Patch Management

When Windows machines have network discovery enabled, they spin up a web server listening on Port 5357. This server processes SOAP (Simple Object Access Protocol) messages wrapped in HTTP requests to facilitate plug-and-play network capabilities. Enumeration and Reconnaissance

If you run a nmap -p5357 192.168.1.0/24 and see open , you might have stumbled upon a Windows service that is poorly understood but potentially dangerous: .

: Configure Windows Defender Firewall to restrict access to Port 5357 exclusively to the local subnet or trusted administrative systems. port 5357 hacktricks

: While there are no widespread "one-click" exploits for Port 5357 itself, it increases the target's attack surface by confirming the operating system and potentially leaking internal metadata about connected hardware.

While WSDAPI is a utility protocol, it handles complex unauthenticated parsing tasks, opening up avenues for exploit chains.

This is the most common use case. Attackers can query the WSD interface to leak device hostnames, printer names, network paths, and device metadata useful for fingerprinting a target . Limit access exclusively to the local VLAN or

If successful, you might get device control or even SYSTEM.

Block port 5357 at the perimeter firewall. This port should never be exposed to the public internet.

: Note that this port is typically open in unmanaged or small office networks where "Network Discovery" is enabled. In highly secured environments, hardening recommendations This server processes SOAP (Simple Object Access Protocol)

: While less common than port 80 or 443, if the service is misconfigured, it might be leveraged in NTLM relay attacks or for internal network scanning. Common Nmap Command nmap -sV -p 5357 Use code with caution. Copied to clipboard

Exposed printer or scanner interfaces can sometimes be accessed without authentication, potentially allowing job manipulation or further reconnaissance within a local network. Mitigation Additional WS-Discovery Functionality - Win32 apps

This indicates the service is Microsoft’s HTTPAPI , which can be used for SSDP/UPnP discovery.