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

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Jul

Released

2021-07-13

EPSS Score

1.18% (percentile: 78.8%)

FAQ

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is Personally Identifiable Information (PII). There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software? Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.

Affected Products (3)

Microsoft Office

• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Enterprise Server 2013 Service Pack 1
• Microsoft SharePoint Foundation 2013 Service Pack 1

Security Updates (5)

• 5001976
• 5001981
• 5001984
• 5001992
• 5001996

Acknowledgments

mr_me working with Trend Micro Zero Day Initiative

Revision History

• 2021-07-13: Information published.