Port 5357 Hacktricks [2021] Now

the internal network to identify specific Windows versions or hardware models. Vulnerability Surface

Running an aggressive service scan against a target machine frequently reveals the port associated with wsdapi .

WS-Discovery functions via specific UUID-based paths. Attackers look for active endpoints using directory brute-forcing tools like gobuster or feroxbuster , although standard wordlists rarely contain WSD UUIDs. port 5357 hacktricks

Port 5357 is commonly utilized by Microsoft Windows for the Web Services on Devices (WSD) API. This service allows devices like printers, scanners, and file shares to be discovered and managed automatically over a local network. While highly convenient for enterprise and home networking, exposing this port can provide attackers with valuable reconnaissance data and potential vectors for lateral movement.

By querying this port, an attacker can discover hostnames, network paths, and unique device metadata. the internal network to identify specific Windows versions

Typical reconnaissance and exploitation techniques

Run a targeted Nmap scan to identify the service version and execute default enumeration scripts. nmap -p 5357 -sV -sC Use code with caution. -p 5357 : Specifies the target port. -sV : Detects service and version information. -sC : Runs default Nmap scripts against the port. HTTP Enumeration While highly convenient for enterprise and home networking,

Port 5357 serves as a perfect example of why a thorough penetration test goes beyond merely checking for the "big-name" vulnerabilities. While the service it hosts—WSDAPI—provides legitimate and valuable "plug-and-play" functionality, it also represents a real and often overlooked attack vector. The service's history of memory corruption flaws and the ongoing risks from misconfigurations mean that for a security professional, 5357 is a port that always merits a closer look during any network assessment.

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.

Port 5357 is primarily associated with Web Services for Devices (WSDAPI)

: If network discovery is not required, this service can be disabled by turning off "Network Discovery" in the Windows Sharing settings or blocking the port via Windows Defender Firewall . How to block TCP port 445 in Windows - ManageEngine