CVE-2026-67305

HighCVSS 8.8/10Last modified Sep 8, 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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	< 3.29.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jrExploit, Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-windows-client-before-heap-buffer-overflow-via-cliprdrThird Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jrExploit, Vendor Advisory

Timeline

Published: Aug 1, 2026
Last modified: Sep 8, 2026
NVD status: Analyzed

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