CVE-2026-121393Medium· 6.5▾ TwilightPoC availableFreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rect…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 35.8 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.4%
FreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rectangle with x set to 65535 alongside a SurfaceBits destination left of 1, triggering a 16-bit coordinate assertion in rfx_process_message that terminates the client process.
FreeRDP >= 3.0.0 < 3.32.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-121951High· 7.5FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event
CVE-2026-121960High· 7.5FreeRDP before 3.32.2 Unauthenticated Denial of Service via CredSSP TSRequest
CVE-2026-121409Medium· 5.9FreeRDP before 3.32.2 Denial of Service via Oversized X.224 Routing Token
CVE-2026-121389Low· 3.1FreeRDP 3.27.0 before 3.32.2 Client DoS via RDPDR Device Announcement Logging
CVE-2026-121406Medium· 4.3FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload
CVE-2026-121394Medium· 6.5FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder