CVE-2026-88164: CWE-862: Missing Authorization in Microsoft Microsoft SharePoint Server Subscription Edition
Description
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Microsoft SharePoint Server Subscription Edition
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-88164 is a missing authorization vulnerability (CWE-862) in Microsoft SharePoint Server Subscription Edition. It enables an attacker with some level of authorization to elevate their privileges remotely over a network. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. The affected versions are >=16.0.0 and <16.0.20326.20190. Microsoft has published an official fix for this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to gain elevated privileges on the affected SharePoint server, potentially leading to full compromise of the system's confidentiality, integrity, and availability.
Mitigation Recommendations
Apply the official patch provided by Microsoft for CVE-2026-88164 as soon as possible. The vendor advisory confirms that an official fix is available. No additional mitigation steps are specified beyond applying the update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:58:19.187Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88164","vendor":"Microsoft"}]
Threat ID: 6acfc4772cdf04f6569de0c1
Added to database: 10/14/2026, 18:05:43 UTC
Last enriched: 10/14/2026, 18:18:12 UTC
Last updated: 10/14/2026, 19:00:29 UTC
Views: 3
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