CVE-2025-66273CWE-78

QTS, QuTS hero

High · published June 10, 2026

CVSS v4.0
8.6
EPSS
1%
Percentile
64.0
In the wild
Unconfirmed
What it is

A command injection vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to execute arbitrary commands.

We have already fixed the vulnerability in the following versions:

QTS 5.2.9.3410 build 20260214 and later

QuTS hero h5.2.9.3410 build 20260214 and later

QuTS hero h5.3.4.3500 build 20260520 and later

QuTS hero h6.0.0.3397 build 20260206 and later

The record
Technical detail
CVSS v4.0
8.6 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.01051 · 64.0th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-06-10T03:04Z
EPSS history
Timeline
  • 10 JUN 03:04Z
    QTS, QuTS hero
    cvelistv5