---
id: "CVE-2026-115679"
kind: "vulnerability"
aliases: ["CVE-2026-115679"]
title: "Arm Keil MDK-Middleware FTP server: out-of-bounds read and write in RX buffer"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["arm-keil", "embedded", "ftp-server", "mdk-middleware", "other"]
not_affected_if: ["ftp-server-unused"]
published_at: "2026-10-26T16:17:17+00:00"
first_seen_at: "2026-10-26T16:31:01+00:00"
updated_at: "2026-10-26T16:33:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115679", "first_seen_at": "2026-10-26T16:31:01+00:00"}]
---

# Arm Keil MDK-Middleware FTP server: out-of-bounds read and write in RX buffer

Arm Keil MDK-Middleware 8.3.0 has a flaw that may allow out-of-bounds reads and writes to the FTP Server RX buffer. The sources do not say what an attacker can achieve beyond memory corruption.

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

## How to check

- Check whether the project uses Arm Keil MDK-Middleware and which version is in use, for example in the pack list of the Keil MDK project; the affected version is `8.3.0`
- unknown

## Fix

- Move to a fixed MDK-Middleware release; unknown which version fixes it, check the Arm advisory
- unknown

## Timeline

- 2026-10-26T16:31:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115679

## From the sources

Arm Keil MDK-Middleware 8.3.0 may allow out-of-bounds reads and writes to the FTP Server RX Buffer

---

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