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 fix
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 gateway/WebSocket peer sending a non-empty Ping control frame causes the client to reply with an overlong Pong that discloses bytes beyond the received payload (the peer receives the masking key and can unmask the reply). A zero-length Ping reaches an assertion and terminates the client (denial of service).
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-67292
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-672920.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67292 | 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
- criticalCVE-2026-68579: FreeRDP before 3.30.0 (<= 3.29.0) contains a heap-based buffer overflow in the Windows clipboa…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
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