CVE-2026-33113: Microsoft SharePoint Server Spoofing Vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Other sources
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
— Microsoft
Microsoft SharePoint Server Spoofing Vulnerability
— Microsoft
Affected Software
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 16.0.5556.1005Patch KB5002880 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20384Patch KB5002873 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20153Patch KB5002874
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33113?
CVE-2026-33113 has a medium severity rating of 5.4.
What systems are affected by CVE-2026-33113?
CVE-2026-33113 affects Microsoft SharePoint Server Subscription Edition, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, and other Microsoft SharePoint Server versions.
How do I fix CVE-2026-33113?
To fix CVE-2026-33113, update Microsoft SharePoint with the latest security patches provided by Microsoft.
What type of vulnerability is CVE-2026-33113?
CVE-2026-33113 is a spoofing vulnerability caused by improper neutralization of input during web page generation, specifically cross-site scripting.
What impact does CVE-2026-33113 have on users?
CVE-2026-33113 can allow an authorized attacker to perform spoofing attacks over a network, potentially leading to unauthorized access or information disclosure.