Vulnerability in FreeRDP

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund19 Oct 2026WID-SEC-2026-4039

  FreeRDP: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-121412CVE-2026-121407CVE-2026-121400+20 more CVEs

[ References ]References

• github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3hf9-w6hr-hf9jVendor Advisory
• www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-oversized-x-22…Third Party Advisory