CVE-2026-109495: Microsoft Office SharePoint Elevation of Privilege Vulnerability

Q: Who can exploit this vulnerability?

An attacker must already be authorized to access the affected SharePoint Server Subscription Edition environment. Exploitation is performed over the network and does not require user interaction.

Q: What level of access is required before exploitation?

The attacker needs high privileges before exploiting the issue. The vulnerability may then allow elevation of privilege because of missing authorization.

Q: How difficult is exploitation?

The supplied vector rates attack complexity as high. This indicates exploitation requires conditions beyond simply reaching the affected service with the required privileges.

Published Nov 10, 2026

Updated

Microsoft Office SharePoint Elevation of Privilege Vulnerability

Other sources

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

— Microsoft

Affected Software

1 affected componentFixes available

Microsoft SharePoint Server Subscription Edition<16.0.20326.20278

16.0.20326.20278

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20278Patch KB5002945

Event History

Nov 10, 2026

CVE Published

via Microsoft·04:00 PM

Data Sourced

via Microsoft·04:00 PM

DescriptionSeverityWeaknessAffected Software

CVE Published

via MITRE·06:20 PM

Data Sourced

via MITRE·06:20 PM

DescriptionSeverity

Data Sourced

via NVD·07:18 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Who can exploit this vulnerability?

An attacker must already be authorized to access the affected SharePoint Server Subscription Edition environment. Exploitation is performed over the network and does not require user interaction.

What level of access is required before exploitation?

The attacker needs high privileges before exploiting the issue. The vulnerability may then allow elevation of privilege because of missing authorization.

How difficult is exploitation?

The supplied vector rates attack complexity as high. This indicates exploitation requires conditions beyond simply reaching the affected service with the required privileges.

CVE-2026-109495: Microsoft Office SharePoint Elevation of Privilege Vulnerability

Other sources

Affected Software

Remediation

Event History

Frequently Asked Questions

Who can exploit this vulnerability?

What level of access is required before exploitation?

How difficult is exploitation?

Company

Resources

Contact

Frequently Asked Questions

Who can exploit this vulnerability?

What level of access is required before exploitation?

How difficult is exploitation?