ZDI-CAN-28886: ZDI-26-556: Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability

Published Aug 11, 2026

Updated

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels RAS Client. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-18263.

Affected Software

1 affected component

Parallels RAS Client

Event History

Aug 11, 2026

Advisory Published

via ZDI·05:00 AM

Data Sourced

via ZDI·05:00 AM

Description

Frequently Asked Questions

What is the severity of ZDI-CAN-28886?

The severity of ZDI-CAN-28886 is rated at 7.8 on the CVSS scale.

How do I fix ZDI-CAN-28886?

To mitigate ZDI-CAN-28886, update your Parallels RAS Client to the latest version provided by the vendor.

Who is affected by ZDI-CAN-28886?

ZDI-CAN-28886 affects installations of the Parallels RAS Client where local attackers can execute low-privileged code.

Can ZDI-CAN-28886 be exploited remotely?

No, ZDI-CAN-28886 requires local access to the affected system for exploitation.

What type of vulnerability is ZDI-CAN-28886?

ZDI-CAN-28886 is a local privilege escalation vulnerability.