Microsoft SharePoint Remote Code Execution Vulnerability

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Summary

CVECVE-2020-1102
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-05-21 23:15:14 UTC
Updated2026-08-19 17:17:17 UTC
DescriptionA remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account. Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint. The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.151340000 probability, percentile 0.964590000 (date 2026-08-19)

Problem Types: CWE-434 | Remote Code Execution

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary6.5AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:S/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft Sharepoint Enterprise Server 2016 All All All
Application Microsoft Sharepoint Server 2019 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Microsoft SharePoint Enterprise Server 2016 affected 16.0.0 publication custom x64-based Systems
CNA Microsoft Microsoft SharePoint Server 2019 affected 16.0.0 publication custom x64-based Systems

References

ReferenceSourceLinkTags
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1102 af854a3a-2127-422b-91ae-364da2661108 portal.msrc.microsoft.com Patch, Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1102 [email protected] msrc.microsoft.com
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