---
cve: "CVE-2025-66277"
severity: "CRITICAL"
cvss: 9.2
epss: "63%"
vendor: "QNAP Systems Inc."
kev: false
exploited: false
published: "2026-02-11 13:15:58"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T07:49:41+02:00"
---

# CVE-2025-66277

> 9.2 CRITICAL

## Beschreibung

A link following vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to traverse the file system to unintended locations.

We have already fixed the vulnerability in the following versions:
QTS 5.2.8.3350 build 20251216 and later
QuTS hero h5.3.2.3354 build 20251225 and later
QuTS hero h5.2.8.3350 build 20251216 and later

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://www.qnap.com/en/security-advisory/qsa-26-05>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-66277) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_