by Kastro
Paper/Archive/CVE-2026-82041

CVE-2026-82041

UTMStack UTMStack — UTMStack < 11.2.16 Missing Authorization via Command WebSocket

EPSS 0.4%CVSS 9.9
critical.is priorityof 100
37
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 38.1.381 × 207.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
UTMStack< 11.2.1611.2.16CNA

Scores by source

VulnCheck (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)6.5CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/UTMStack/UTMStack/releases/tag/v11.2.16patchgithub.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecddwriteupvulncheck.com/advisories/utmstack-missing-authorization-via-command-websocket