CVE-2026-18263 Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability
Local attackers can escalate privileges to SYSTEM by exploiting an exposed dangerous function in the Parallels RAS Client RDP Backend Service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18263?
CVE-2026-18263 is a high-severity vulnerability in Parallels RAS Client, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability. 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 specific flaw exists within the RAS RDP Backend Service. The issue results from an exposed dangerous function. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28886.
Weakness: CWE-749
Which versions are affected by CVE-2026-18263?
How do I fix CVE-2026-18263?
No fix has been published for CVE-2026-18263 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18263 being exploited?
There is no known exploitation of CVE-2026-18263 in the wild and no public exploit code.
Sources
Also known as GHSA-vpmj-2529-7w95.