ZDI-26-554: Parallels RAS Client RDP Backend Service Exposed Dangerous Function Local Privilege Escalation Vulnerability
ZDI advisory discloses Parallels RAS Client RDP backend service local privilege escalation (CVE-2026-13121, CVSS 7.8).
ZDI advisory ZDI-26-554 describes an exposed dangerous function vulnerability in the RDP backend service of Parallels RAS Client, tracked as CVE-2026-13121 with a CVSS score of 7.8. Local attackers with the ability to execute low-privileged code can escalate privileges on affected installations.
- Exposed dangerous function in Parallels RAS Client RDP backend
- CVE-2026-13121, CVSS 7.8, local privilege escalation
- Requires existing low-privileged code execution
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-13121 | Local Privilege Escalation to SYSTEM in Parallels RAS Client RDP Backend Service | 7.8 | <1% |
From the original article
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.
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