---
id: CVE-2026-62872
title: .NET Framework Elevation of Privilege Vulnerability
summary: >-
  Incorrect authorization in .NET Framework allows an authorized attacker to
  elevate privileges 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/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-863
vendor: Microsoft
product: Microsoft .NET Framework 3.5
affected:
  - .net_framework_3.5 >= 3.5.0 < 2.0.50727.9183 & 3.0.30729.9169
  - >-
    .net_framework_3.5_and_4.6.2_4.7_4.7.1_4.7.2 >= 3.0.0.0 < 2.0.50727.8984 &
    3.0.30729.8980 & 4.7.4144.0
  - >-
    .net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9070 & 3.0.30729.9068 &
    4.7.4144.0
  - >-
    .net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9070 & 3.0.30729.9068 &
    4.8.4805.0
  - >-
    .net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9183 & 3.0.30729.9169 &
    4.8.9343.0
  - .net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4144.0
  - .net_framework_4.8 >= 4.8.0 < 4.8.4805.0
  - .net_framework_4.8.1 >= 4.8.0.0 < 4.8.9344.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-06T00:00:00+00:00'
published: '2026-08-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T16:25:56.778Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62872'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62872'
    label: .NET Framework Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00538
epssPercentile: 0.44219
ingestedAt: '2026-09-08T18:07:34.890Z'
---

## Overview

Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.

## Affected

- `.net_framework_3.5 >= 3.5.0 < 2.0.50727.9183 & 3.0.30729.9169`
- `.net_framework_3.5_and_4.6.2_4.7_4.7.1_4.7.2 >= 3.0.0.0 < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0`
- `.net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0`
- `.net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0`
- `.net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0`
- `.net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4144.0`
- `.net_framework_4.8 >= 4.8.0 < 4.8.4805.0`
- `.net_framework_4.8.1 >= 4.8.0.0 < 4.8.9344.0`

## Remediation

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