Out-of-bounds read in FreeRDP - CVE-2026-67290
Published: July 16, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU137827
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-67290
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the TSMF FFmpeg decoder path when parsing AVC1 MPEG2VIDEOINFO media types with short ExtraData. A remote attacker can send specially crafted server-controlled media format data to cause a denial of service.
Only deployments with the deprecated and optional TSMF feature and the FFmpeg decoder path available are vulnerable.
Affected software
FreeRDP
How to mitigate CVE-2026-67290
Install security update from vendor's website.
FreeRDP - update to 3.29.0