# CVE-2026-70306

## Summary

- **CVE ID:** CVE-2026-70306
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C)
- **CWE:** CWE-79
- **Published:** Aug 11, 2026
- **Last Modified:** Sep 10, 2026

## Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing 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-2026-70306)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.75%
- **EPSS Percentile:** 52.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._