CVE-2026-68579: FreeRDP before 3.30.0 (<= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE pas
FreeRDP before 3.30.0 (<= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-68579
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-68579 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for FreeRDP
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-68580: FreeRDP before 3.29.0 contains integer overflow vulnerabilities in the audio input redirection…nvd · 2026-08-02
- mediumCVE-2026-67306: FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 pl…nvd · 2026-08-01
- unknownCVE-2026-67305: FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clip…nvd · 2026-08-01
- highCVE-2026-67304: FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device co…nvd · 2026-08-01
- mediumCVE-2026-67303: FreeRDP before 3.29.0 contains a reachable assertion (WINPR_ASSERT(OutputBufferLength == Bytes…nvd · 2026-08-01
- mediumCVE-2026-67302: FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a divide-by-zero vulnerability in…nvd · 2026-08-01
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