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Vulnerability record · CVE-2026-63520 · published 11 August 2026

CVE-2026-63520: Microsoft sharepoint server improper input validation vulnerability

Microsoft · Sharepoint Server

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

8.1 CVSS 3.1 High EPSS 0.96% · top 40.1% CWE-20 · Improper input validation
8.1CVSS 3.1 base score
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
13 Aug 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63520 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-63520), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.