CVE-2026-57156 FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing
A malicious RDP peer can trigger an integer overflow in FreeRDP clients to cause a heap buffer overflow, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-57156?
CVE-2026-57156 is a high-severity vulnerability in Freerdp Freerdp, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. This issue is fixed in version 3.28.0.
Which versions are affected by CVE-2026-57156?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-57156?
Upgrade to a fixed version.
Is CVE-2026-57156 being exploited?
There is no known exploitation of CVE-2026-57156 in the wild and no public exploit code.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-57156, GHSA-v5wf-j8j4-77h7, MINI-h52x-9442-w264, UBUNTU-CVE-2026-57156.