Is CVE-2026-34391 actively exploited?

No active exploitation of CVE-2026-34391 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34391 be exploited remotely?

Yes. CVE-2026-34391 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34391?

CVE-2026-34391 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-34391

CWE-488Published: March 27, 2026· Updated: Apr 2, 2026

7.5

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:6.4th

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.

NVD Source

Technical Analysis

CVE-2026-34391 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.