---
cve: "CVE-2026-44420"
severity: "HIGH"
cvss: 8.8
epss: "3.7%"
vendor: "FreeRDP"
kev: false
exploited: false
published: "2026-05-29 20:16:24"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T06:33:25+02:00"
---

# CVE-2026-44420

> 8.8 HIGH · 🧪 PoC

## Beschreibung

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP client can trigger a heap-buffer-overflow write in FreeRDP's server-side clipboard (cliprdr) channel by sending a CB_CLIP_CAPS PDU with a too-small capabilitySetLength. This can crash the server process (remote DoS) and may be exploitable for code execution because it corrupts heap memory. This vulnerability is fixed in 3.26.0.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| 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 |

## Patch verfügbar (OSV)

- 3f6d7cb1f8973cc84c66b258a9a61c4e2b2f30a6 (Commit)

## Referenzen

- <https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mvpx-xj7r-3p3r>
- <https://access.redhat.com/errata/RHSA-2026:36203>
- <https://access.redhat.com/errata/RHSA-2026:46393>
- <https://access.redhat.com/security/cve/CVE-2026-44420>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2483480>
- <https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-h6wq-j5mv-f3q8>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44420.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44420) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_