CVE-2026-88206: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft SharePoint Server Subscription Edition
Description
CVE-2026-88206 is a Server-Side Request Forgery (SSRF) vulnerability in Microsoft SharePoint Server Subscription Edition. It allows an authorized attacker to elevate privileges over a network. The vulnerability affects versions 16.0.0 up to but not including 16.0.20326.20190. A fix is officially available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Microsoft SharePoint Server Subscription Edition
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-88206 and classified under CWE-918, involves a server-side request forgery flaw in Microsoft SharePoint Server Subscription Edition. An authorized attacker can exploit this SSRF vulnerability to elevate their privileges within the network. The CVSS v3.1 base score is 7.5, indicating a high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requiring low privileges but high attack complexity. The vulnerability affects versions >=16.0.0 and <16.0.20326.20190. Microsoft has issued an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges over the network, potentially compromising confidentiality, integrity, and availability of the affected SharePoint server environment. The high CVSS score reflects significant impact on the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update for Microsoft SharePoint Server Subscription Edition to versions 16.0.20326.20190 or later as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88206. No additional mitigation steps are indicated beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T22:01:13.385Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88206","vendor":"Microsoft"}]
Threat ID: 6ace856b2cdf04f656a003a7
Added to database: 10/13/2026, 19:24:27 UTC
Last enriched: 10/14/2026, 01:03:37 UTC
Last updated: 10/14/2026, 01:03:37 UTC
Views: 3
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