---
id: CVE-2026-69789
title: >-
  Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST)
  allows an unauthorized attacker to execute code over an adjacent network.
summary: >-
  Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST)
  allows an unauthorized attacker to execute code over an adjacent network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T22:17:44.740'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69789'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69789'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:28.959Z'
---

## Overview

Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.