CVE-2026-20958: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft SharePoint Enterprise Server 2016
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20958) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) is classified as CWE-918: Server-Side Request Forgery (SSRF). It enables an authorized attacker to cause the server to make unintended requests, potentially disclosing information over a network. The CVSS 3.1 base score is 5.4, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. Microsoft has published an official fix for this vulnerability as indicated in their security update guide.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can cause the SharePoint server to disclose information over the network. The impact is limited to confidentiality and integrity with no availability impact. The vulnerability requires attacker privileges and does not require user interaction.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958. Applying this patch will remediate the vulnerability.
CVE-2026-20958: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
CVSS v3.1
Score 5.4medium
Affected software
Microsoft
Microsoft SharePoint Enterprise Server 2016
Microsoft
Microsoft SharePoint Server 2019
Microsoft
Microsoft SharePoint Server Subscription Edition
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20958) in Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) is classified as CWE-918: Server-Side Request Forgery (SSRF). It enables an authorized attacker to cause the server to make unintended requests, potentially disclosing information over a network. The CVSS 3.1 base score is 5.4, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. Microsoft has published an official fix for this vulnerability as indicated in their security update guide.
Potential Impact
An authorized attacker exploiting this SSRF vulnerability can cause the SharePoint server to disclose information over the network. The impact is limited to confidentiality and integrity with no availability impact. The vulnerability requires attacker privileges and does not require user interaction.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users of Microsoft SharePoint Enterprise Server 2016 version 16.0.0 should apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958. Applying this patch will remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.340Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958","vendor":"Microsoft"}]
Threat ID: 69668ae6a60475309f9ae265
Added to database: 01/13/2026, 18:11:50 UTC
Last enriched: 07/30/2026, 23:52:47 UTC
Last updated: 09/10/2026, 22:25:38 UTC
Views: 181
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