CVE-2026-34391

Fleet Vulnerable to Windows MDM cross-device command disclosure

State: Published
Severity: 6.6 Medium
Published: Mar 27, 2026
Updated: Mar 27, 2026
Reserved: Mar 27, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.6 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U	GitHub_M

Weaknesses

CWE-488 Exposure of Data Element to Wrong Session

Affected Products

Product	Versions
fleetfleetdm	< 4.81.1Affected

References

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

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