FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.
History

Sun, 20 Sep 2026 01:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 15 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.
Title FreeRDP 3.14.0 through 3.30.0 Out-of-bounds Write via urbdrc
First Time appeared Freerdp
Freerdp freerdp
Weaknesses CWE-617
CPEs cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Vendors & Products Freerdp
Freerdp freerdp
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-15T15:18:08.518Z

Updated: 2026-09-20T00:35:29.652Z

Reserved: 2026-09-15T11:07:34.398Z

Link: CVE-2026-91951

cve-icon Vulnrichment

Updated: 2026-09-20T00:30:28.458Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-15T16:17:49.340

Modified: 2026-09-24T12:15:20.537

Link: CVE-2026-91951

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-15T15:18:08Z

Links: CVE-2026-91951 - Bugzilla