Hacktricks Fixed: Port 5357

If the WSD endpoint belongs to a , the host might be vulnerable to the PrintNightmare chain:

# Service discovery nmap -p 5357 <target>

The most immediate and effective measure is to ensure all systems, especially legacy ones, are fully patched. Apply all relevant Microsoft security updates, including the old but critical MS09-063 patch from 2009. port 5357 hacktricks

Stop and disable the ( fdphost ) service.

If you are hardening a network against enumeration tactics, port 5357 should be locked down. If the WSD endpoint belongs to a ,

The service utilizes SOAP XML messages over HTTP to exchange device metadata, capabilities, and status updates. 2. Active Reconnaissance & Enumeration

nmap -p 5357 -sV -sC <target-ip>

: Attached printers, storage devices, and local shares. HTTP.sys Vulnerabilities

Ensure Port 5357 TCP is never exposed to the public Internet. If you are hardening a network against enumeration

Because WS-Discovery relies on multicast communication to discover devices, an attacker inside the network can spoof WS-Discovery responses. : Set up a malicious rogue device.

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.