---
id: "CVE-2026-121410"
kind: "vulnerability"
aliases: ["CVE-2026-121410"]
title: "FreeRDP: malicious RDP server crashes client session via zero-size surface"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["freerdp", "package", "rdp", "remote-desktop"]
not_affected_if: ["trusted-servers-only", "version-3.32.2-or-later"]
published_at: "2026-11-03T15:17:29+00:00"
first_seen_at: "2026-11-03T15:21:58+00:00"
updated_at: "2026-11-03T15:24:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121410", "first_seen_at": "2026-11-03T15:21:58+00:00"}]
---

# FreeRDP: malicious RDP server crashes client session via zero-size surface

FreeRDP before 3.32.2 does not validate zero width and height in the RDPGFX WIRETOSURFACE_2 handler. A malicious RDP server can send a crafted PDU that triggers an assertion or division by zero and terminates the client session.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed FreeRDP version (for example with `xfreerdp --version`) and see whether it is below `3.32.2`.
- Confirm whether the client connects to RDP servers you do not control.

## Fix

- FreeRDP: move to `3.32.2` or later.

## Timeline

- 2026-11-03T15:21:58+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121410

## Documents

- [advisory] Vendor advisory: github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-fqw6-jf2h-6fj6
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-rdpgfx-alpha-wiretosurface-2

## From the sources

FreeRDP before 3.32.2 contains a denial of service vulnerability in the RDPGFX ALPHA WIRETOSURFACE_2 handler that fails to validate zero surface dimensions. A malicious RDP server can send a crafted WIRETOSURFACE_2 PDU with zero width and height, triggering an assertion or division by zero that terminates the client session.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_