What’s Vulnerable › Vulnerabilities
CVE-2026-102866: Microsoft Office SharePoint Elevation of Privilege Vulnerability
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-31
- Weakness: CWE-347
Description
Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
Affected products
- Microsoft SharePoint Server: before 16.0.20326.20190 — fixed in 16.0.20326.20190
- Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.20326.20190 — fixed in 16.0.20326.20190
How to fix
Upgrade to a fixed version: Microsoft SharePoint Server 16.0.20326.20190; Microsoft SharePoint Server Subscription Edition 16.0.20326.20190. Check the vendor advisory for mitigations.
References
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