Is CVE-2026-121390 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121390?

CVE-2026-121390 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-121390

Description

FreeRDP 3.0.0 before 3.32.2 built with WITH_AAD=ON contains a reachable assertion because its ARM gateway response parser accepts a missing or non-string redirectedServerCert field and passes a null buffer to the certificate parser. A malicious or malformed user-selected gateway can return such a response to abort the client process.