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CVE-2026-45484: sharepoint server vulnerability
CVE-2026-45484: high vulnerability affecting sharepoint server. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 8.8 HIGH
- EPSS
- 97.85%
- Known exploited
- not in KEV
- Product
- sharepoint server
What is known
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Business impact
Successful exploitation of CVE-2026-45484, a high vulnerability (CVSS 8.8) affecting sharepoint server, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether sharepoint server is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.