What is CVE-2026-22901?

CVE-2026-22901 is a critical-severity vulnerability in QNAP Qunetswitch, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-20.

How severe is CVE-2026-22901?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in QNAP Qunetswitch

CVE-2026-22901

A command injection vulnerability has been reported to affect QuNetSwitch. If a remote attacker gains a user account, they can then exploit the vulnerability to execute arbitrary commands. We have already fixed the vulnerability in the following version: QuNetSwitch 2.0.5.0906 and later

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

QNAP Qunetswitch
QNAP Systems Inc. Qunetswitch — versions 2.0.x

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.qnap.com/en/security-advisory/qsa-26-11 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-22901?: CVE-2026-22901 is a critical-severity vulnerability in QNAP Qunetswitch, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-20.
How severe is CVE-2026-22901?: Critical severity. CVSS v3 base score is 9.8 out of 10.