PT-2026-67264 · Freerdp · Freerdp

Acorn421 · CVE-2026-66401 · Published 2026-08-01 · Updated 2026-08-01

Positive Technologies (AI Summary)

CVSS v4.0

2.4

Low

Base vector

AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.29.0

Description An out-of-bounds heap read occurs in the UVC H.264 extension-unit parser when the system fails to validate the descriptor length before accessing the GUID field. A local attacker using a malicious USB video camera can trigger this read beyond allocated bounds during camera stream setup, resulting in a denial of service.

Recommendations Update to version 3.29.0 or later.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-66401

GHSA-8JJ2-67PG-J6MG

Affected Products

Freerdp

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66401.json · Exploit
• https://github.com/FreeRDP/FreeRDP/commit/5044d5390035c6fd9a36ad885192d97d21e8a92d · Patch
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-66401 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-66401 · Security Note
• https://vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264 · Note