---
id: CVE-2026-62783
title: Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
summary: >-
  Heap-based buffer overflow in Windows Remote Access Connection Manager allows
  an authorized attacker to elevate privileges locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-122
vendor: Microsoft
product: Windows 10 Version 1809
affected:
  - windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121
  - windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7663
  - windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7663
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704
  - windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121
  - >-
    windows_server_2019_server_core_installation >= 10.0.17763.0 <
    10.0.17763.9121
  - windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33296
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-12T03:56:36.345559Z'
published: '2026-08-11'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:44:41.671Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62783'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62783'
    label: >-
      Windows Remote Access Connection Manager Elevation of Privilege
      Vulnerability
tags:
  - cve.org
epss: 0.01951
epssPercentile: 0.79374
ingestedAt: '2026-09-08T18:07:34.899Z'
---

## Overview

Heap-based buffer overflow in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

## Affected

- `windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7663`
- `windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7663`
- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517`
- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7517`
- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168`
- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168`
- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704`
- `windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9121`
- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499`
- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296`
- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296`

## Remediation

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