CVE-2021-27076

HIGH EXPLOITED

Microsoft SharePoint Server - Remote Code Execution

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-27076 has been observed exploited in the wild (reported by VulnCheck KEV).

Description

Microsoft SharePoint Server Remote Code Execution Vulnerability

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-276/

Scores

CVSS v3 8.8
EPSS 0.1439
EPSS Percentile 96.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

VulnCheck KEV 2026-06-24
Status published
Products (4)
microsoft/business_productivity_servers 2010 sp2
microsoft/sharepoint_foundation 2013 sp1
microsoft/sharepoint_server 2016
microsoft/sharepoint_server 2019
Published Mar 11, 2021
Tracked Since Feb 18, 2026