Look for <wsdp:Get> – this allows you to request internal device info.
Usually open on Windows clients (Vista and later), IoT devices, and network printers. Associated Ports:
Additionally, it uses for service discovery via multicasting.
An initial Nmap scan will reveal the state of the port and identify the underlying Microsoft HTTP API version. nmap -p 5357 -sV -sC Use code with caution. port 5357 hacktricks
WSDAPI endpoints often expose specific XML schemas. You can query the root or typical WSD paths to check for a response: curl http:// :5357/WSDAL/ Use code with caution. 3. Information Disclosure Risks
Get-CimInstance -Namespace root\cimv2 -ClassName Win32_PnPEntity | Where-Object $_.Caption -match "WSD" Use code with caution. 5. Mitigation and Hardening
When you encounter port 5357 open during an internal engagement, your primary goal is to gather information about the host, operating system version, and device type. Nmap Scanning Look for <wsdp:Get> – this allows you to
PORT STATE SERVICE 5357/tcp open wsd
By looking up the service name discovered during enumeration, the penetration tester was able to identify that this specific HTTPAPI service was vulnerable to a known exploit. In this particular VAPT, the tester successfully used a Metasploit module to compromise the system. The report confirmed the exploit worked reliably, granting a high level of access to the target.
From a defensive perspective, the mitigation strategies for port 5357 are straightforward but frequently overlooked in corporate governance. The standard recommendation is to disable the "Function Discovery Resource Publication" service and "SSDP Discovery" service on machines that do not require device broadcasting. In a hardened Active Directory environment, workstations should rely on the Domain Name System (DNS) rather than peer-to-peer discovery. Closing this port reduces the attack surface by silencing the machine on the local network segment, making it invisible to casual scanners. An initial Nmap scan will reveal the state
If successful, you might get device control or even SYSTEM.
This sends a Probe message and lists all advertised devices, their types, scopes, and metadata addresses.
If the service must remain active for local device discovery (such as office printing), ensure that Port 5357 is strictly blocked at the network perimeter firewall and restricted to trusted local subnets via the Windows Defender Firewall.
Tracing the digital breadcrumbs, the analyst discovered this port belongs to the Web Services for Devices API (WSDAPI)
Note: Seeing a "404 Not Found" or "503 Service Unavailable" response via a standard browser request is normal. The server requires specific endpoints or SOAP requests to yield data. Interacting via HTTP
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