---
id: CVE-2021-34519
title: Microsoft SharePoint Server Information Disclosure Vulnerability
summary: Microsoft SharePoint Server Information Disclosure Vulnerability
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
vendor: microsoft
product: sharepoint_foundation
affected:
  - sharepoint_foundation = 2013
  - sharepoint_server = 2013
  - sharepoint_server = 2016
published: '2021-07-14'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-34519'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34519'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34519
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-21-830/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.06086
epssPercentile: 0.93166
zeroDay: true
ingestedAt: '2026-08-10T16:41:17.382Z'
---

## Overview

Microsoft SharePoint Server Information Disclosure Vulnerability

## Affected

- `sharepoint_foundation = 2013`
- `sharepoint_server = 2013`
- `sharepoint_server = 2016`

## Remediation

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