# CVE-2026-63520

## Summary

- **CVE ID:** CVE-2026-63520
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
- **CWE:** CWE-20
- **Published:** Aug 11, 2026
- **Last Modified:** Sep 16, 2026

## Description

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

## Affected Products

- Microsoft — Microsoft SharePoint Enterprise Server 2016 (16.0.0)
- Microsoft — Microsoft SharePoint Server 2019 (16.0.0)
- Microsoft — Microsoft SharePoint Server Subscription Edition (16.0.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63520)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 2.89%
- **EPSS Percentile:** 86.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._