Vulnerability DatabaseCVE-2026-67305
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CVE-2026-67305
Published:August 01, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/FreeRDP/FreeRDP.git (GITHUB):
Affected version(s) >=3.0.0 <3.29.0
Fix Suggestion:
Update to version 3.29.0
Related Resources (4)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67305.json
https://nvd.nist.gov/vuln/detail/CVE-2026-67305
https://www.vulncheck.com/advisories/freerdp-windows-client-before-heap-buffer-overflow-via-cliprdr
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jr
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CVSS v4
Base Score:
9.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Heap-based Buffer Overflow
CWE-122
EPSS
Base Score:
0.49