# CVE-2026-70321

## Summary

- **CVE ID:** CVE-2026-70321
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
- **CWE:** CWE-502
- **Published:** Aug 11, 2026
- **Last Modified:** Sep 10, 2026

## Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

## Affected Products

- Microsoft — Microsoft SharePoint Server Subscription Edition (16.0.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70321)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.28%
- **EPSS Percentile:** 68.3

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