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cve recordhigh

CVE-2026-63520

microsoft · sharepoint server

Published
CVSS8.1
Severityhigh
WeaknessCWE-20
ExploitedNot in CISA KEV

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

References

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Our coverage of CVE-2026-63520

CVE-2026-63520critical

Rapid7 Analysis: Microsoft SharePoint Remote Code Execution (CVE-2026-63520)

Rapid7 has published a technical analysis of CVE-2026-63520, a critical remote code execution vulnerability in Microsoft SharePoint. The vulnerability allows an authenticated attacker to execute arbitrary code on a vulnerable server by uploading a malicious BDC model file. When combined with another vulnerability, CVE-2026-55040, it can lead to unauthenticated RCE.