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, classified under CWE-502. Exploiting this vulnerability enables an attacker with some level of authorization to elevate their privileges remotely. The CVSS 3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue as detailed in their security update guide.
Potential Impact
An authorized attacker can leverage this vulnerability to gain elevated privileges on the affected SharePoint server remotely, potentially leading to full compromise of the system's confidentiality, integrity, and availability.
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
Affected software
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, classified under CWE-502. Exploiting this vulnerability enables an attacker with some level of authorization to elevate their privileges remotely. The CVSS 3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue as detailed in their security update guide.
Potential Impact
An authorized attacker can leverage this vulnerability to gain elevated privileges on the affected SharePoint server remotely, potentially leading to full compromise of the system's confidentiality, integrity, and availability.
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: 06/09/2026, 17:26:52 UTC
Last enriched: 07/29/2026, 21:57:07 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 76
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