Name: CVE-2026-66401: Out-of-bounds Read
Creator: Rapid7
Published: 2026-08-01T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-66401, CWE-125, CVSS 2.1, EPSS 0.00201

FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 extension-unit parser that fails to validate descriptor length before accessing the GUID field. A local attacker with a malicious USB video camera can trigger a heap read beyond allocated bounds during camera stream setup, causing denial of service.

CVSS Details

CVSS 4.0 Base Score: 2.4 (LOW)
CVSS 4.0 Vector: (CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 2.1
CVSS 3.1 Vector: (CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Redhat_linux	—	No solution exists	Aug 4, 2026	Aug 1, 2026
Ubuntu	—	Upgrade freerdp3	Aug 17, 2026	Aug 1, 2026

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CVSS Details

Covered by Rapid7

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