CVE-2026-121400: high-severity vulnerability in FreeRDP
FreeRDP before 3.32.2 CPU Exhaustion via RDG Control Packet
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
FreeRDP · FreeRDPRelated CVEs — FreeRDP
In the same product, most dangerous first.
CVE-2026-45700HIGHHeap-buffer-overflow write in planar bitmap decoderEPSS 6.1%CVE-2026-44420HIGHFreeRDP cliprdr server heap-buffer-overflow via undersized capabilitySetLength in CB_CLIP_CAPSEPSS 4.6%CVE-2024-32459CRITICALFreeRDP Out-Of-Bounds Read in ncrush_decompressEPSS 3.7%CVE-2022-24882CRITICALServer side NTLM does not properly check parameters in FreeRDPEPSS 2.8%CVE-2022-24883HIGHFreeRDP Server authentication might allow invalid credentials to passEPSS 2.3%CVE-2020-11019MEDIUMOut of bound read in update_recv in FreeRDPEPSS 2.3%