Remote Desktop Client Remote Code Execution Vulnerability

The impact of CVE-2025-48817 is significant due to its RCE nature. An attacker exploiting this vulnerability could gain complete control over the affected system, potentially leading to data theft, system compromise, and lateral movement within the network. Successful exploitation requires network access to the vulnerable Remote Desktop Client instance. The attacker could leverage this foothold to install malware, steal sensitive information, or disrupt operations. This vulnerability shares similarities with other path traversal exploits, where attackers manipulate file paths to access unauthorized resources.

Organizations heavily reliant on Remote Desktop Client for remote access are particularly at risk. Environments with legacy systems running older, vulnerable versions of the client are also highly susceptible. Shared hosting environments where multiple users share the same Remote Desktop Client installation should be prioritized for patching.

• windows / supply-chain:

Get-Process -Name rdpclip | Stop-Process -Force

• windows / supply-chain:

Get-WinEvent -LogName Application -FilterXPath "*[System[Provider[@Name='Microsoft-Windows-RemoteDesktopServices']]]" | Where-Object {$_.Message -match 'PathTraversal'}

• windows / supply-chain: Check Autoruns for suspicious entries related to Remote Desktop Client or its components. • windows / supply-chain: Use Sysinternals Process Monitor to monitor file access attempts by Remote Desktop Client, looking for attempts to access files outside the expected directory.

1. 2025-07-08Disclosure

   disclosure

1. Reserviert2025-05-26
2. Veröffentlicht2025-07-08
3. Geändert2026-02-26
4. EPSS aktualisiert2026-03-23

The primary mitigation for CVE-2025-48817 is to upgrade the Remote Desktop Client to version 10.0.26100.4652 or later. If immediate upgrading is not feasible, consider implementing network segmentation to restrict access to the Remote Desktop Client. While a direct WAF rule is unlikely to be effective against this path traversal, strict input validation on any data sent to the client could offer a layer of defense. Monitor network traffic for suspicious connections or file access attempts originating from unexpected sources. After upgrading, confirm the fix by attempting a path traversal attack and verifying that access is denied.