Out-of-bounds read in FreeRDP - #VU137827
Published: July 16, 2026
Vulnerability identifier: #VU137827
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
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.
Remediation
Install security update from vendor's website.