Vulnerability Report

CVE-2026-4064

Title: Missing authorization in PowerShell Universal

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-4064.

CWE Category CWE-862
Published Date Mar 17, 2026
Modified Date Mar 19, 2026
Exploit Status Not Found
Score 8.3 CVSS v
Exploit Probability (EPSS)
0.39%

Vulnerability Summary

CVE-2026-4064: Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.

Impacted Vendors

I
ironmansoftware 1
D
devolutions 1

Reference Links

https://devolutions.net/security/advisories/DEVO-2026-0008
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
8.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-4064 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected Stack

No specific products linked.