What’s Vulnerable › Vulnerabilities

CVE-2021-34519: Microsoft SharePoint Server Information Disclosure Vulnerability

• Severity: low (CVSS 2.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-14 · updated 2026-08-10

Description

Microsoft SharePoint Server Information Disclosure Vulnerability

Affected products

• Microsoft SharePoint Foundation 2013 Service Pack 1: 2013-sp1
• Microsoft SharePoint Server: 2013-sp1, 2016
• Microsoft SharePoint Enterprise Server 2013 Service Pack 1: from 15.0.0 before 15.0.5363.1000 — fixed in 15.0.5363.1000
• Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5188.1000 — fixed in 16.0.5188.1000
• Microsoft SharePoint Foundation 2013 Service Pack 1: from 15.0.0 before 15.0.5363.1000 — fixed in 15.0.5363.1000

How to fix

Upgrade to a fixed version: Microsoft SharePoint Enterprise Server 2013 Service Pack 1 15.0.5363.1000; Microsoft Sharepoint Enterprise Server 2016 16.0.5188.1000; Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5363.1000. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34519
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34519
• https://www.zerodayinitiative.com/advisories/ZDI-21-830/

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