The Remote Desktop Protocol (RDP) is everywhere in enterprise environments, and it is one of the most frequently exploited attack vectors in cybersecurity. Open RDP ports are scanned and probed millions of times every day by automated tools looking for weak credentials and unpatched vulnerabilities.

Why RDP is such a rewarding target

RDP gives direct graphical access to remote systems. That makes it just as valuable to legitimate administrators as it is to attackers. Once an attacker gains access over RDP with valid credentials, they have practically the same control as a local administrator sitting at the machine.

Common attack techniques against RDP

• Brute force: Automated tools test millions of credential combinations against open RDP ports.
• BlueKeep and related CVEs: Unpatched RDP vulnerabilities allow remote code execution without authentication.
• Pass-the-hash: Stolen password hashes are used to log in without ever needing to know the plaintext password.
• Lateral movement: Attackers use RDP to move between systems on the network after the initial breach.

"RDP was the top attack vector for ransomware delivery three years in a row. Exposing it directly to the internet is indefensible." CISA Advisory

Hardening your RDP configuration

When RDP is necessary, it has to be hardened thoroughly. Require Network Level Authentication (NLA), enforce multi-factor authentication, restrict access to specific IP ranges, change the default port, and monitor every session with a PAM solution. Better still: consider replacing direct RDP with a secure remote access gateway that delivers the same capabilities without expanding your attack surface.

RDP does not have to be a risk. With the right controls in place, or better yet replaced by a modern secure access solution, organizations can provide the remote connectivity their teams need without exposing themselves to unnecessary danger.