CVE-2026-48560: Microsoft SharePoint Server Spoofing Vulnerability
Deserialization of untrusted data 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 authorized 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 16.0.19725.20384Patch KB5002873 - 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 16.0.10417.20153Patch KB5002874
Event History
Frequently Asked Questions
What is the severity of CVE-2026-48560?
CVE-2026-48560 has a medium severity level, rated at 5.4.
What software is affected by CVE-2026-48560?
CVE-2026-48560 affects Microsoft SharePoint Server, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, and Microsoft SharePoint Server Subscription Edition.
How do I fix CVE-2026-48560?
To fix CVE-2026-48560, apply the latest security updates provided by Microsoft for the affected SharePoint Server versions.
What type of vulnerability is CVE-2026-48560?
CVE-2026-48560 is classified as a spoofing vulnerability caused by improper input handling in SharePoint.
Can CVE-2026-48560 lead to data breaches?
Yes, CVE-2026-48560 could allow an attacker to spoof credentials and gain unauthorized access to sensitive information.