{"id":"CVE-2026-67305","title":"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 b…","summary":"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 b…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"freerdp","product":"freerdp","affected":["freerdp < 3.29.0"],"patched":["freerdp 3.29.0"],"published":"2026-08-01","updated":"2026-09-08","sourceUpdated":"2026-09-08T14:04:42.583","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67305","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jr","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-windows-client-before-heap-buffer-overflow-via-cliprdr","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jr","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00768,"epssPercentile":0.53576,"ingestedAt":"2026-08-02T07:18:01.532Z","slug":"CVE-2026-67305","body":"## Overview\n\nFreeRDP 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.\n\n## Affected\n\n- `freerdp < 3.29.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `freerdp 3.29.0`","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[{"seq":5429,"id":"CVE-2026-67305","ts":1788887281563,"field":"cvss","old":null,"new":"8.8"},{"seq":5428,"id":"CVE-2026-67305","ts":1788887281563,"field":"severity","old":"none","new":"high"},{"seq":4312,"id":"CVE-2026-67305","ts":1788886395397,"field":"cvss","old":"8.8","new":null},{"seq":4311,"id":"CVE-2026-67305","ts":1788886395397,"field":"severity","old":"high","new":"none"},{"seq":3052,"id":"CVE-2026-67305","ts":1788883059173,"field":"cvss","old":null,"new":"8.8"},{"seq":3051,"id":"CVE-2026-67305","ts":1788883059173,"field":"severity","old":"none","new":"high"},{"seq":2081,"id":"CVE-2026-67305","ts":1788882463888,"field":"cvss","old":"8.8","new":null},{"seq":2080,"id":"CVE-2026-67305","ts":1788882463888,"field":"severity","old":"high","new":"none"},{"seq":265,"id":"CVE-2026-67305","ts":1788881643369,"field":"cvss","old":null,"new":"8.8"},{"seq":264,"id":"CVE-2026-67305","ts":1788881643369,"field":"severity","old":"none","new":"high"}]}