CVE-2026-4064
Authorization Bypass in PowerShell Universal gRPC Services Enables Privilege Escalation
Publication date: 2026-03-17
Last updated on: 2026-03-19
Assigner: Devolutions Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| ironmansoftware | powershell_universal | to 2026.1.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-862 | The product does not perform an authorization check when an actor attempts to access a resource or perform an action. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves missing authorization checks on multiple gRPC service endpoints in PowerShell Universal versions before 2026.1.4. It allows any authenticated user with a valid token to bypass role-based access controls.
As a result, the user can perform privileged operations such as reading sensitive data, creating or deleting resources, and disrupting service operations by sending specially crafted gRPC requests.
How can this vulnerability impact me? :
The impact of this vulnerability includes unauthorized access to sensitive data, unauthorized creation or deletion of resources, and potential disruption of service operations.
Because role-based access controls can be bypassed, users who should not have privileged access may gain it, leading to potential data breaches, loss of data integrity, and service downtime.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know