Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M

CVE-2026-34391Fleet Vulnerable to Windows MDM cross-device command disclosure

Medium 6.6

In plain English

A medium-severity security flaw in fleet from fleetdm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 4.0)6.6Medium

Exploit odds (30 days)0.2%top 93.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
fleetdm	fleet	< 4.81.1

Weakness: CWE-488 · Vector: 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

References

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