by Kastro
Paper/Archive/CVE-2026-57156

CVE-2026-57156

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

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 53.1.531 × 2010.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
FreeRDP< 3.28.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

exploitgithub.com/FreeRDP/FreeRDP/security/advisories/GHSA-v5wf-j8j4-77h7refgithub.com/FreeRDP/FreeRDP/pull/12938refgithub.com/FreeRDP/FreeRDP/commit/487f35daccb36a6224e530dcd8fa60850825f823refgithub.com/FreeRDP/FreeRDP/releases/tag/3.28.0