CVE-2026-55052: CWE-862: Missing Authorization in Microsoft Microsoft SharePoint Enterprise Server 2016
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-862) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) is due to missing authorization checks, enabling an authorized attacker to perform privilege escalation remotely. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as detailed in their security update guide.
Potential Impact
An attacker with authorized network access can exploit this missing authorization vulnerability to elevate their privileges, potentially gaining higher-level access than intended. This can lead to full compromise of confidentiality, integrity, and availability of the affected SharePoint server.
Mitigation Recommendations
Apply the official patch provided by Microsoft as soon as possible to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55052 for detailed patch information and deployment instructions.
CVE-2026-55052: CWE-862: Missing Authorization in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-862) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) is due to missing authorization checks, enabling an authorized attacker to perform privilege escalation remotely. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as detailed in their security update guide.
Potential Impact
An attacker with authorized network access can exploit this missing authorization vulnerability to elevate their privileges, potentially gaining higher-level access than intended. This can lead to full compromise of confidentiality, integrity, and availability of the affected SharePoint server.
Mitigation Recommendations
Apply the official patch provided by Microsoft as soon as possible to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55052 for detailed patch information and deployment instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:13:49.836Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55052","vendor":"Microsoft"}]
Threat ID: 6a5676b368715ace43f0aaa1
Added to database: 07/14/2026, 17:49:39 UTC
Last enriched: 08/13/2026, 15:36:14 UTC
Last updated: 08/26/2026, 01:13:26 UTC
Views: 85
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