CVE-2026-121400 — Vulnerability intelligence
freerdp — freerdp
Published:
- CVSS
- 7.1
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
FreeRDP before 3.32.2 contains a denial-of-service vulnerability in rdg_process_control_packet that allows a malicious RD Gateway to exhaust client CPU by sending an incomplete keepalive control packet. Attackers completing the RDG tunnel-open exchange then send an eight-byte header with packetLength 0xFFFF and withhold the body, causing an unbounded no-progress read loop that spins one client thread at full CPU.