CVE-2026-67305
FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- State
- Published
- Severity
- 9.4 Critical
- Published
- Aug 1, 2026
- Updated
- Aug 5, 2026
- Reserved
- Jul 29, 2026
Description
FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clipboard virtual channel when processing CLIPRDR_FILE_CONTENTS_RESPONSE PDUs without validating the server-provided size against the destination buffer. A malicious RDP server can send a response with a data payload significantly larger than requested, causing arbitrary heap memory corruption that may enable remote code execution when a user performs a paste operation.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | VulnCheck |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- GitHub Security Advisory (GHSA-cj9v-h4hq-29jr)vendor-advisory
- VulnCheck Advisory: FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdrthird-party-advisory
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