---
cve: "CVE-2026-64921"
severity: "HIGH"
cvss: 8.8
epss: "100%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-08-11 17:18:53"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-08-31T18:54:55+02:00"
---

# CVE-2026-64921

> 8.8 HIGH

## Beschreibung

Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64921>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64921) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_