CVE-2026-66401

LOW 2.1

FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264

CVSS Score

2.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-125
Vendor	freerdp
Product	freerdp
Published	Aug 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

FreeRDP / FreeRDP

0 < 3.29.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg github.com: https://github.com/FreeRDP/FreeRDP/commit/5044d5390035c6fd9a36ad885192d97d21e8a92d vulncheck.com: https://www.vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264

Credits

🔍 acorn421