---
cve: "CVE-2026-20931"
severity: "HIGH"
cvss: 8.0
epss: "79%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-01-13 18:16:20"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T02:40:56+02:00"
---

# CVE-2026-20931

> 8.0 HIGH

## Beschreibung

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

## CVSS-Vektor

```
CVSS:3.1/AV:A/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 | Benachbart | warn |
| 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-2026-20931>
- <https://www.vicarius.io/vsociety/posts/cve-2026-20931-detection-script-elevation-of-privilege-vulnerability-in-windows-telephony-service>
- <https://www.vicarius.io/vsociety/posts/cve-2026-20931-mitigation-script-elevation-of-privilege-vulnerability-in-windows-telephony-service>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-20931) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_