CVE-2026-56157: CWE-284: Improper Access Control in Microsoft Microsoft SharePoint Enterprise Server 2016
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) involves improper access control (CWE-284) that could allow an authorized attacker to conduct spoofing attacks over a network. The CVSS 3.1 vector indicates the attack requires network access with low complexity and privileges, no user interaction, and impacts confidentiality and integrity with low severity. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker could exploit this vulnerability to spoof identities or data over a network, potentially leading to limited confidentiality and integrity impacts. There is no impact on availability. No known exploits are reported 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-2026-56157 to remediate this vulnerability.
CVE-2026-56157: CWE-284: Improper Access Control in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CVSS v3.1
Score 5.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) involves improper access control (CWE-284) that could allow an authorized attacker to conduct spoofing attacks over a network. The CVSS 3.1 vector indicates the attack requires network access with low complexity and privileges, no user interaction, and impacts confidentiality and integrity with low severity. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker could exploit this vulnerability to spoof identities or data over a network, potentially leading to limited confidentiality and integrity impacts. There is no impact on availability. No known exploits are reported 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-2026-56157 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-19T13:53:31.988Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56157","vendor":"Microsoft"}]
Threat ID: 6a5676b968715ace43f0ae27
Added to database: 07/14/2026, 17:49:45 UTC
Last enriched: 08/13/2026, 15:44:57 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 74
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