Authenticated privilege escalation
Published Oct 13, 2026 · Updated Oct 13, 2026
Missing authorization in Microsoft SharePoint Server Subscription Edition allows remote authenticated users to elevate privileges over a network. The CNA does not identify the affected operation, the missing authorization check, or how attacker-controlled input reaches it; its sole vendor reference was inaccessible during research. Low-privileged access is sufficient without user interaction, but the resulting privilege level and specific operations exposed are undisclosed.
Summary
What happened
Missing authorization in Microsoft SharePoint Server Subscription Edition allows remote authenticated users to elevate privileges over a network. The CNA does not identify the affected operation, the missing authorization check, or how attacker-controlled input reaches it; its sole vendor reference was inaccessible during research. Low-privileged access is sufficient without user interaction, but the resulting privilege level and specific operations exposed are undisclosed.
The record
- CVE
- CVE-2026-88198
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Microsoft SharePoint Server Subscription Edition
- Classifications
- CWE-862
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.20326.20190
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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