---
id: CVE-2026-77906
title: >-
  Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to
  execute code over a network.
summary: >-
  Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to
  execute code over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: microsoft
product: visual_studio_2026
affected:
  - 'visual_studio_2026 >= 18.9.0, < 18.9.3'
patched:
  - visual_studio_2026 18.9.3
published: '2026-09-08'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T20:06:43.557'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77906'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77906'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T04:26:55.344790Z'
epss: 0.00751
epssPercentile: 0.53525
ingestedAt: '2026-09-08T19:08:49.628Z'
---

## Overview

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

## Affected

- `visual_studio_2026 >= 18.9.0, < 18.9.3`

## Remediation

Upgrade past the affected range:

- `visual_studio_2026 18.9.3`