CVE-2026-109251CWE-129

CVE-2026-109251

Medium · published October 12, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
13.9
In the wild
Unconfirmed
What it is

FreeRDP before 3.32.0 stores the server-supplied signed MS-RDPEGT geometry origin unchecked in an unsigned video surface coordinate, so the blit clamp in gdiVideoShowSurface() wraps in 32-bit arithmetic and is skipped. A malicious RDP server can send a negative topLevelLeft to clients connecting with /video, causing an out-of-bounds write of decoded H.264 picture data or a client abort.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00237 · 13.9th percentile
Weakness
CWE-129 · Improper Validation of Array Index
Published
2026-10-12T21:17Z
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-grvc-qhhp-7h6m · [email protected]https://www.vulncheck.com/advisories/freerdp-before-3.32.0-out-of-bounds-write-via-ms-rdpegt-video-geometry · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-grvc-qhhp-7h6m · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:04Z
    FreeRDP before 3.32.0 Out-of-Bounds Write via MS-RDPEGT Video Geometry
    cvelistv5
  • 12 OCT 16:04Z
    FreeRDP before 3.32.0 Out-of-Bounds Write via MS-RDPEGT Video Geometry
    cvelistv5