CVE-2026-40368: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40368) affects Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) and is classified as CWE-502: Deserialization of Untrusted Data. It enables an attacker with authorized access to execute arbitrary code remotely by exploiting unsafe deserialization mechanisms. The CVSS 3.1 base score is 8.0, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized attacker can execute arbitrary code remotely on affected SharePoint servers, potentially leading to full compromise of the system, including unauthorized access, data manipulation, and service disruption.
Mitigation Recommendations
Apply the official patch provided by Microsoft as detailed in their security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368. This is the recommended and supported remediation to fully address the vulnerability.
CVE-2026-40368: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 8.0high
Affected software
Microsoft
Microsoft SharePoint Enterprise Server 2016
Microsoft
Microsoft SharePoint Server 2019
Microsoft
Microsoft SharePoint Server Subscription Edition
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40368) affects Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) and is classified as CWE-502: Deserialization of Untrusted Data. It enables an attacker with authorized access to execute arbitrary code remotely by exploiting unsafe deserialization mechanisms. The CVSS 3.1 base score is 8.0, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized attacker can execute arbitrary code remotely on affected SharePoint servers, potentially leading to full compromise of the system, including unauthorized access, data manipulation, and service disruption.
Mitigation Recommendations
Apply the official patch provided by Microsoft as detailed in their security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368. This is the recommended and supported remediation to fully address the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-11T23:06:15.614Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368","vendor":"Microsoft"}]
Threat ID: 6a036550cbff5d861008c8fb
Added to database: 05/12/2026, 17:37:20 UTC
Last enriched: 08/11/2026, 16:44:55 UTC
Last updated: 09/14/2026, 22:01:33 UTC
Views: 62
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