---
id: CVE-2026-105016
title: >-
  Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker
  to execute code over a network.
summary: >-
  Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker
  to execute code over a network.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T23:17:26.170'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105016'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105016'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-13T19:43:28.913Z'
vendor: Microsoft
product: .NET 10.0
affected:
  - .net_10.0 >= 10.0.0 < 10.0.14
  - .net_11.0 >= 11.0.0 < 11.0.0-rc.2.26504.105
  - .net_8.0 >= 8.0.0 < 8.0.32
  - .net_9.0 >= 9.0.0 < 9.0.21
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.42
  - visual_studio_2026_version_18.10 >= 18.10.0 < 18.10.4
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7652
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7652
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9711
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9711
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.3231
  - windows_11_version_26h2 >= 10.0.26300.0 < 10.0.26300.9711
  - windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5761
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33650
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33650
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-15T00:00:00+00:00'
epss: 0.01658
epssPercentile: 0.76502
---

## Overview

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

## Remediation

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