CVE-2026-82041

CRITICAL 9.9

UTMStack < 11.2.16 Missing Authorization via Command WebSocket

CVSS Score

9.9

EPSS Score

0.0%

EPSS Percentile

0th

UTMStack before 11.2.16 contains a missing authorization vulnerability in UTMIncidentCommandWebsocket.processCommand(), the handler mapped to the /command/{hostname} STOMP destination, where no role check or command allowlist is applied before forwarding supplied commands. Any authenticated user, regardless of role, can send arbitrary operating-system commands over gRPC to any connected agent, resulting in command execution on monitored endpoints where agent processes commonly run as root or SYSTEM.

CWE	CWE-862
Vendor	utmstack
Product	utmstack
Published	Oct 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

UTMStack / UTMStack

0 < 11.2.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16 github.com: https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd vulncheck.com: https://www.vulncheck.com/advisories/utmstack-missing-authorization-via-command-websocket

Credits

Adam Nurudini (QwesiRED) VulnCheck