---
id: CVE-2026-67642
title: >-
  Heap-based buffer overflow in SQL Server allows an authorized attacker to
  execute code over a network.
summary: >-
  Heap-based buffer overflow in SQL Server allows an authorized attacker to
  execute code over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: microsoft
product: sql_server_2025
affected:
  - sql_server_2025 < 17.0.1135.8
  - 'sql_server_2025 >= 17.0.4006.2, < 17.0.4085.5'
patched:
  - sql_server_2025 17.0.4085.5
published: '2026-09-08'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T19:34:28.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67642'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67642'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.0049
epssPercentile: 0.41264
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-08T18:57:00.653644Z'
ingestedAt: '2026-09-08T19:08:49.605Z'
---

## Overview

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

## Affected

- `sql_server_2025 < 17.0.1135.8`
- `sql_server_2025 >= 17.0.4006.2, < 17.0.4085.5`

## Remediation

Upgrade past the affected range:

- `sql_server_2025 17.0.4085.5`