CVE-2026-45484: 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 elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45484) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is caused by improper deserialization of untrusted data, categorized under CWE-502. Exploitation requires the attacker to have some level of authorization and network access, enabling privilege escalation. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges on the affected SharePoint server, potentially leading to full compromise of the system's confidentiality, integrity, and availability. This can result in unauthorized access to sensitive information and disruption of services.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484 to remediate this vulnerability.
CVE-2026-45484: 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 elevate privileges over a network.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45484) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is caused by improper deserialization of untrusted data, categorized under CWE-502. Exploitation requires the attacker to have some level of authorization and network access, enabling privilege escalation. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges on the affected SharePoint server, potentially leading to full compromise of the system's confidentiality, integrity, and availability. This can result in unauthorized access to sensitive information and disruption of services.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T16:07:22.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484","vendor":"Microsoft"}]
Threat ID: 6a284cdc8dd33fbd85664d51
Added to database: 6/9/2026, 5:26:52 PM
Last enriched: 6/9/2026, 10:11:23 PM
Last updated: 6/10/2026, 7:09:35 AM
Views: 3
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