CVE-2026-57158: Freerdp

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.

Affected products

• Freerdp Freerdp: from 3.21.0, before 3.28.0 (fixed in 3.28.0)

Published 2026-07-10. Last modified 2026-07-14.