Heap-based buffer overflow in FreeRDP - CVE-2026-57156
Published: July 6, 2026
Vulnerability identifier: #VU136927
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: CVE-2026-57156
CWE-ID: CWE-122
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 or execute arbitrary code.
The vulnerability exists due to integer overflow leading to heap-based buffer overflow in libfreerdp/core/orders.c when parsing Orders Delta Points data from a malicious RDP peer. A remote attacker can send a specially crafted value to trigger heap memory corruption to cause a denial of service or execute arbitrary code.
Only 32-bit builds are vulnerable.
How to mitigate CVE-2026-57156
Install security update from vendor's website.