Is CVE-2026-121409 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121409?

CVE-2026-121409 has a CVSS v3 severity of MEDIUM (5.9).

What does CVE-2026-121409 affect?

CVE-2026-121409 affects freerdp.

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CVE-2026-121409

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Description

FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthenticated peers to abort clients or proxies via oversized X.224 routing tokens. Attackers can send an oversized LoadBalanceInfo in a Server Redirection PDU, or a 240–247 byte token to a FixedTarget freerdp-proxy, triggering a tpdu_write_header assertion that crashes the process.