FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the FreeRDP clientโs `gdi_SurfaceToSurface` path due to a mismatch between destination rectangle clamping and the actual copy size. A malicious server can trigger a clientโside heap buffer overflow, causing a crash (DoS) and potential heap corruption with code
VulnCheck: FreeRDP is
Exploit
CVE-2026-23532
VulnCheck
Update to v3.21.0