EUVD-2026-63462
GHSA-mvfc-8q3g-835f
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack requiring low-privileged foothold; no complexity barrier; full SYSTEM impact confined to the vulnerable host with unchanged scope.
Primary rating from Vendor (zdi).
CVSS VectorVendor: zdi
Lifecycle Timeline
2DescriptionCVE.org
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-28885.
AnalysisAI
Local privilege escalation in Parallels RAS Client 21.0.26296 allows low-privileged local attackers to gain SYSTEM-level code execution by invoking an exposed dangerous function within the RAS RDP Backend Service. The root cause is CWE-749, where a privileged service function is accessible without proper access control to lower-privileged callers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already possess low-privileged local code execution on the target Windows machine - this is an explicit prerequisite per the CVSS AV:L/PR:L vector and the vulnerability description. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.0 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately describes a reliable, low-complexity local privilege escalation path: the only prerequisite is an existing low-privileged foothold on the target host, with no interaction barriers or elevated configuration requirements. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is to upgrade Parallels RAS Client to a version that addresses this vulnerability as released by Parallels. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct an inventory of all systems running Parallels RAS Client 21.0.26296 using asset discovery or endpoint management tools and notify infrastructure and security teams of exposure scope. …
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Same weakness CWE-749 – Exposed Dangerous Method or Function
View allSame technique Privilege Escalation
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External POC / Exploit Code
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