CVE-2025-48817: RCE in Remote Desktop Client

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 further lateral movement within the network. The relative path traversal allows attackers to manipulate file paths, potentially overwriting critical system files or executing malicious payloads. Successful exploitation could grant an attacker persistent access, enabling them to establish a foothold and exfiltrate sensitive information. This vulnerability shares similarities with other path traversal exploits, where attackers leverage improper input validation to access unauthorized resources.

1. Reserved2025-05-26
2. Published2025-07-08
3. Modified2026-02-26
4. EPSS updated2026-03-23

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 limit the potential blast radius of a successful attack. While a direct workaround isn't available, restricting network access to the Remote Desktop Client service can reduce the attack surface. Monitor network traffic for unusual connections or file access attempts related to the Remote Desktop Client. After upgrading, verify the fix by attempting to access files outside the intended directory via the Remote Desktop Client – the operation should fail with an access denied error.