CVE-2026-88164

8.8High

Published 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

8.8High

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-862

Impact

Authenticated attackers with network access can gain elevated administrative privileges within SharePoint. They only need standard domain or user-level access to trigger it.

Root cause

The application fails to perform proper authorization checks on privileged operations (CWE-862).

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Install the security update from the vendor advisory once available; if patching must wait, restrict SharePoint network access to trusted internal IP ranges.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88164

Source: nvd.nist.gov/vuln/detail/CVE-2026-88164