CVE-2026-67306

FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 planar RLE bitmap decoder functions planardecompressplanerle and planardecompressplanerleonly in libfreerdp/codec/planar.c. Only the 1-byte control byte is bounds-checked; the subsequent 0–15...

CVE-2026-67291 FreeRDP before 3.29.0 Heap Out-of-Bounds Read via GLYPH_FRAGMENT_ADD

FreeRDP before 3.29.0 affected versions = 3.28.0 contains a heap out-of-bounds read in updateprocessglyphfragments/glyphcachefragmentput in libfreerdp/cache/glyph.c. When handling a GLYPHFRAGMENTADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it...

CVE-2026-67292

FreeRDP before 3.29.0 contains a buffer over-disclosure vulnerability in the gateway WebSocket transport libfreerdp/core/gateway/websocket.c. The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload, so a malicious...

CVE-2026-67300

FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async update message proxy for RAIL WINDOWSTATEORDER and NOTIFYICONSTATEORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy shallow-copies...

CVE-2026-67299

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOWICONORDER when AsyncUpdate is enabled e.g. xfreerdp /async-update. In updatemessageWindowIcon a shallow CopyMemory overwrites a freshly allocated lParam-iconInfo with the parser-owned...

CVE-2026-67295 FreeRDP before 3.29.0 Path Traversal via drive redirection

FreeRDP before 3.29.0 fails to properly validate server-supplied RDPDR paths in drive redirection, allowing attackers to access prefix-sibling paths outside the configured shared root. A malicious RDP server can read, write, delete, and enumerate files in sibling directories by sending non-rooted...

CVE-2026-67303 FreeRDP before 3.29.0 Denial of Service via serial DeviceControl

FreeRDP before 3.29.0 contains a reachable assertion WINPRASSERTOutputBufferLength == BytesReturned in serialprocessirpdevicecontrol in channels/serial/client/serialmain.c. When serial device redirection is enabled and a server-controlled IRPMJDEVICECONTROL request specifies an unsupported IOCTL...

CVE-2026-67299 FreeRDP before 3.29.0 Use-After-Free via WindowIcon async message

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOWICONORDER when AsyncUpdate is enabled e.g. xfreerdp /async-update. In updatemessageWindowIcon a shallow CopyMemory overwrites a freshly allocated lParam-iconInfo with the parser-owned...

CVE-2026-67300

FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async update message proxy for RAIL WINDOWSTATEORDER and NOTIFYICONSTATEORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy shallow-copies...

CVE-2026-67299 FreeRDP before 3.29.0 Use-After-Free via WindowIcon async message

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOWICONORDER when AsyncUpdate is enabled e.g. xfreerdp /async-update. In updatemessageWindowIcon a shallow CopyMemory overwrites a freshly allocated lParam-iconInfo with the parser-owned...

EUVD-2026-51823

FreeRDP before 3.29.0 affected versions = 3.28.0 contains a heap out-of-bounds read in updateprocessglyphfragments/glyphcachefragmentput in libfreerdp/cache/glyph.c. When handling a GLYPHFRAGMENTADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it...

CVE-2026-67288 FreeRDP before 3.29.0 Denial of Service via smartcard cache

FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARDIOCTLREADCACHEA and SCARDIOCTLWRITECACHEA operations. When smartcard emulation is enabled, attackers can send crafted smartcard cache...

CVE-2026-67298 FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Underflow

FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler railserverhandlemessages in channels/rail/server/railmain.c. When processing a RAIL PDU header, the code subtracts RAILPDUHEADERLENGTH from the peer-controlled orderLength field without firs...

EUVD-2026-51835

FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 planar RLE bitmap decoder functions planardecompressplanerle and planardecompressplanerleonly in libfreerdp/codec/planar.c. Only the 1-byte control byte is bounds-checked; the subsequent 0–15...

CVE-2026-67291 FreeRDP before 3.29.0 Heap Out-of-Bounds Read via GLYPH_FRAGMENT_ADD

FreeRDP before 3.29.0 affected versions = 3.28.0 contains a heap out-of-bounds read in updateprocessglyphfragments/glyphcachefragmentput in libfreerdp/cache/glyph.c. When handling a GLYPHFRAGMENTADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it...

CVE-2026-67288 FreeRDP before 3.29.0 Denial of Service via smartcard cache

FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARDIOCTLREADCACHEA and SCARDIOCTLWRITECACHEA operations. When smartcard emulation is enabled, attackers can send crafted smartcard cache...

CVE-2026-67299

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOWICONORDER when AsyncUpdate is enabled e.g. xfreerdp /async-update. In updatemessageWindowIcon a shallow CopyMemory overwrites a freshly allocated lParam-iconInfo with the parser-owned...

CVE-2026-67295

FreeRDP before 3.29.0 fails to properly validate server-supplied RDPDR paths in drive redirection, allowing attackers to access prefix-sibling paths outside the configured shared root. A malicious RDP server can read, write, delete, and enumerate files in sibling directories by sending non-rooted...

CVE-2026-67299 FreeRDP before 3.29.0 Use-After-Free via WindowIcon async message

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOWICONORDER when AsyncUpdate is enabled e.g. xfreerdp /async-update. In updatemessageWindowIcon a shallow CopyMemory overwrites a freshly allocated lParam-iconInfo with the parser-owned...

EUVD-2026-51817

FreeRDP before 3.29.0 fails to properly validate server-supplied RDPDR paths in drive redirection, allowing attackers to access prefix-sibling paths outside the configured shared root. A malicious RDP server can read, write, delete, and enumerate files in sibling directories by sending non-rooted...