CVE-2026-50522: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50522) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is caused by unsafe deserialization of untrusted data, which can be exploited by an attacker to achieve remote code execution without authentication or user interaction. The vulnerability is classified under CWE-502. Microsoft has published an official fix to address this issue, as documented in their security update guide.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on the affected SharePoint server, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the system. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522 to remediate this vulnerability.
CVE-2026-50522: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50522) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is caused by unsafe deserialization of untrusted data, which can be exploited by an attacker to achieve remote code execution without authentication or user interaction. The vulnerability is classified under CWE-502. Microsoft has published an official fix to address this issue, as documented in their security update guide.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on the affected SharePoint server, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the system. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T19:00:41.293Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522","vendor":"Microsoft"}]
Threat ID: 6a566f7968715ace43e6b9c9
Added to database: 07/14/2026, 17:18:49 UTC
Last enriched: 08/13/2026, 15:07:52 UTC
Last updated: 08/28/2026, 11:04:21 UTC
Views: 250
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