Microsoft Azure Virtual Desktop Link Following Local Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Azure Virtual Desktop. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the RdAgent service. By creating a junction, an attacker can abuse the service to delete arbitrary folders and files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-us/security-guidance/researcher-acknowledgments-online-services
Disclosure Timeline
- 2025-08-01 - Vulnerability reported to vendor
- 2025-12-09 - Coordinated public release of advisory
- 2025-12-09 - Advisory Updated
Credit
Filip Dragovic (@filip_dragovic)
