CVE-2026-63516: 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 perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-63516) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It involves CWE-502: Deserialization of Untrusted Data, which can be exploited by an authorized attacker to perform spoofing over a network. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high confidentiality impact but no integrity or availability impact. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to spoof network communications, potentially misleading users or systems by impersonating trusted entities. Confidentiality impact is high, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63516.
CVE-2026-63516: 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 perform spoofing over a network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-63516) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It involves CWE-502: Deserialization of Untrusted Data, which can be exploited by an authorized attacker to perform spoofing over a network. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high confidentiality impact but no integrity or availability impact. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to spoof network communications, potentially misleading users or systems by impersonating trusted entities. Confidentiality impact is high, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63516.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-16T22:05:22.740Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63516","vendor":"Microsoft"}]
Threat ID: 6a7b5825bf8831d53915623f
Added to database: 08/11/2026, 17:13:09 UTC
Last enriched: 08/11/2026, 20:43:44 UTC
Last updated: 08/12/2026, 01:21:14 UTC
Views: 2
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