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Vulnerability Details :

CVE-2026-40368

Summary
Assigner-microsoft
Assigner Org ID-f38d906d-7342-40ea-92c1-6c4a2c6478c8
Published At-12 May, 2026 | 16:58
Updated At-15 May, 2026 | 17:12
Rejected At-
Credits

Microsoft SharePoint Server Remote Code Execution Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:microsoft
Assigner Org ID:f38d906d-7342-40ea-92c1-6c4a2c6478c8
Published At:12 May, 2026 | 16:58
Updated At:15 May, 2026 | 17:12
Rejected At:
▼CVE Numbering Authority (CNA)
Microsoft SharePoint Server Remote Code Execution Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected Products
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft SharePoint Enterprise Server 2016
Platforms
  • x64-based Systems
Versions
Affected
  • From 16.0.0 before 16.0.5552.1002 (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft SharePoint Server 2019
Platforms
  • x64-based Systems
Versions
Affected
  • From 16.0.0 before 16.0.10417.20128 (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft SharePoint Server Subscription Edition
Platforms
  • x64-based Systems
Versions
Affected
  • From 16.0.0 before 16.0.19725.20280 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-502CWE-502: Deserialization of Untrusted Data
Type: CWE
CWE ID: CWE-502
Description: CWE-502: Deserialization of Untrusted Data
Metrics
VersionBase scoreBase severityVector
3.18.0HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Version: 3.1
Base score: 8.0
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368
vendor-advisory
patch
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368
Resource:
vendor-advisory
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secure@microsoft.com
Published At:12 May, 2026 | 18:17
Updated At:13 May, 2026 | 20:52

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.0HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 8.0
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CPE Matches

Microsoft Corporation
microsoft
>>sharepoint_server>>Versions before 16.0.19725.20280(exclusive)
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
Microsoft Corporation
microsoft
>>sharepoint_server>>2016
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
Microsoft Corporation
microsoft
>>sharepoint_server>>2019
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-502Primarysecure@microsoft.com
CWE ID: CWE-502
Type: Primary
Source: secure@microsoft.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368secure@microsoft.com
Vendor Advisory
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368
Source: secure@microsoft.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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EPSS-0.49% / 65.78%
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Rejected-Not Available
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||
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Matching Score-4
Assigner-NVIDIA Corporation
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Matching Score-4
Assigner-Jenkins Project
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||
7 Day CHG~0.00%
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows attackers with permission to create or configure various objects to inject crafted content into Old Data Monitor that results in the instantiation of potentially unsafe objects once discarded by an administrator.

Action-Not Available
Vendor-Jenkins
Product-jenkinsJenkins
CWE ID-CWE-502
Deserialization of Untrusted Data
CVE-2024-24590
Matching Score-4
Assigner-HiddenLayer, Inc.
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Matching Score-4
Assigner-HiddenLayer, Inc.
CVSS Score-8||HIGH
EPSS-82.83% / 99.26%
||
7 Day CHG~0.00%
Published-06 Feb, 2024 | 14:40
Updated-17 Jun, 2025 | 21:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Deserialization of untrusted data can occur in versions 0.17.0 to 1.14.2 of the client SDK of Allegro AI’s ClearML platform, enabling a maliciously uploaded artifact to run arbitrary code on an end user’s system when interacted with.

Action-Not Available
Vendor-clearAllegro.AI
Product-clearmlClearML
CWE ID-CWE-502
Deserialization of Untrusted Data
CVE-2022-30287
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8||HIGH
EPSS-22.15% / 95.86%
||
7 Day CHG+6.62%
Published-28 Jul, 2022 | 21:08
Updated-19 Oct, 2024 | 13:05
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Horde Groupware Webmail Edition through 5.2.22 allows a reflection injection attack through which an attacker can instantiate a driver class. This then leads to arbitrary deserialization of PHP objects.

Action-Not Available
Vendor-n/aHorde LLCDebian GNU/Linux
Product-debian_linuxgroupwaren/a
CWE ID-CWE-502
Deserialization of Untrusted Data
CWE ID-CWE-470
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CVE-2020-26207
Matching Score-4
Assigner-GitHub, Inc.
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Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-8||HIGH
EPSS-0.69% / 72.01%
||
7 Day CHG~0.00%
Published-04 Nov, 2020 | 22:00
Updated-04 Aug, 2024 | 15:49
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Unsafe deserialization in DatabaseSchemaViewer

DatabaseSchemaViewer before version 2.7.4.3 is vulnerable to arbitrary code execution if a user is tricked into opening a specially crafted `.dbschema` file. The patch was released in v2.7.4.3. As a workaround, ensure `.dbschema` files from untrusted sources are not opened.

Action-Not Available
Vendor-databaseschemareader_projectmartinjw
Product-dbschemareaderdbschemareader
CWE ID-CWE-502
Deserialization of Untrusted Data
CVE-2022-4815
Matching Score-4
Assigner-Hitachi Vantara
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Matching Score-4
Assigner-Hitachi Vantara
CVSS Score-8||HIGH
EPSS-0.55% / 67.98%
||
7 Day CHG~0.00%
Published-24 May, 2023 | 21:30
Updated-16 Jan, 2025 | 15:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Hitachi Vantara Pentaho Business Analytics Server - Deserialization of Untrusted Data

Hitachi Vantara Pentaho Business Analytics Server versions before 9.4.0.1 and 9.3.0.3, including 8.3.x deserialize untrusted JSON data without constraining the parser to approved classes and methods. 

Action-Not Available
Vendor-Hitachi Vantara LLCHitachi, Ltd.
Product-vantara_pentaho_business_analytics_servervantara_pentahoPentaho Business Analytics Server
CWE ID-CWE-502
Deserialization of Untrusted Data
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