CVE-2021-31181: Microsoft SharePoint Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

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

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

More Likely

Patch Tuesday

2021-May

Released

2021-05-11

EPSS Score

40.66% (percentile: 97.4%)

Detection & Weaponization (1 sources)

Maturity: Exploit

• Metasploit modules: Microsoft SharePoint Unsafe Control and ViewState RCE

Affected Products (3)

Microsoft Office

• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Server 2019
• Microsoft SharePoint Foundation 2013 Service Pack 1

Security Updates (3)

• 5001917
• 5001916
• 5001935

Acknowledgments

Anonymous working with <a href="https://www.zerodayinitiative.com/">Trend Micro Zero Day Initiative</a>

Revision History

• 2021-05-11: Information published.