CVE-2026-34391: Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command…
CVE-2026-34391 · Severity: high · CVSS 7.5 · Published 2026-03-27
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-34391 being exploited in the wild.
How severe is CVE-2026-34391?
High severity, with a CVSS score of 7.5, published 27 March 2026.
Which products and versions are affected?
Fleetdm Fleet. The advisory does not name versions.
Is there a fix for CVE-2026-34391?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-34391?
Check whether you run Fleetdm Fleet. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.