CVE-2026-34391

Fleet Vulnerable to Windows MDM cross-device command disclosure

Published: Mar 27, 2026Updated: Apr 2, 2026 Sources: CVE List NVDCWE-488

NVD MITRE

7.5CVSSHIGH

Description

Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command processing allows a malicious enrolled device to access MDM commands intended for other devices, potentially exposing sensitive configuration data such as WiFi credentials, VPN secrets, and certificate payloads across the entire Windows fleet. Version 4.81.1 patches the issue.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-488

Affected Products

fleet fleetdm

SaaS

Enterprise Software / itsm-monitoring

fleetdmcommercialEnterprise Software

Exploitability

Official Patch Available

References

https://github.com/fleetdm/fleet/security/advisories/GHSA-wg7j-pcc3-h4rh

github.com

Timeline

Published

Mar 27, 2026

Last Updated

Apr 2, 2026

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