CVE-2026-121409

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.

• CWE-617

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3hf9-w6hr-hf9jVendor Advisory
• https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-oversized-x-224-routing-tokenThird Party Advisory

Published

Nov 3, 2026

Last Modified

Nov 3, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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