CVE-2026-70355: Microsoft SharePoint Server Elevation of Privilege Vulnerability
Published Aug 11, 2026
·Updated
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Other sources
Microsoft SharePoint Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
4 affected componentsFixes available
Microsoft SharePoint Server Subscription Edition<16.0.19725.20522
16.0.19725.20522
Microsoft SharePoint Server 2019<16.0.10417.20198
16.0.10417.20198
Microsoft SharePoint Server<16.0.19725.20522
Microsoft SharePoint Server=2019
Remediation
Event History
Aug 11, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:05 PM
Data Sourced
via MITRE·05:05 PM
DescriptionSeverity
Data Sourced
via NVD·05:19 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-70355?
CVE-2026-70355 has a high severity rating of 8.7.
2
How do I fix CVE-2026-70355?
To fix CVE-2026-70355, apply the available patch from Microsoft.
3
What systems are affected by CVE-2026-70355?
CVE-2026-70355 affects Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Server 2019.
4
What type of vulnerability is CVE-2026-70355?
CVE-2026-70355 is an elevation of privilege vulnerability due to improper input neutralization during web page generation.
5
Can an attacker exploit CVE-2026-70355 remotely?
Yes, an authorized attacker can exploit CVE-2026-70355 over a network.