Is CVE-2026-66154 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66154?

CVE-2026-66154 has a CVSS v3 severity of HIGH (8.3).

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CVE-2026-66154

Description

An insufficient certificate validation in a privileged communication workflow, was identified in a GMS application 9.5.1 (Build 9510.1044) and earlier versions which, under a successful MitM attack and controlled network conditions, could permit unauthorized changes.