What is CVE-2026-57158?

CVE-2026-57158 is a critical-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-07-10.

How severe is CVE-2026-57158?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Freerdp

CVE-2026-57158

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.

Vulnerability class: Buffer Overflow

Published 2026-07-10 · last modified 2026-07-14.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.5th percentile), scored 2026-10-12.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002

Affected products

Freerdp — versions >= 3.21.0, < 3.28.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mp3f-59pg-c5pp (Exploit, Vendor Advisory)
github.com/FreeRDP/FreeRDP/pull/12952 (Patch)
github.com/FreeRDP/FreeRDP/commit/a7e797626fcb7f1d556ce63febb84f9f4a822731 (Patch)
github.com/FreeRDP/FreeRDP/releases/tag/3.28.0 (Release Notes)

Frequently asked questions

What is CVE-2026-57158?: CVE-2026-57158 is a critical-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-07-10.
How severe is CVE-2026-57158?: Critical severity. CVSS v3 base score is 9.1 out of 10.