CVE-2026-57156

HIGH

FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing

Title source: cna
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v4 8.6
EPSS 0.0053
EPSS Percentile 41.0%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-122 CWE-190
Status published
Products (1)
FreeRDP/FreeRDP < 3.28.0
Published Jul 10, 2026
Tracked Since Jul 11, 2026