What is CVE-2026-22900?

CVE-2026-22900 is a critical-severity vulnerability in QNAP Qunetswitch, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-03-20.

How severe is CVE-2026-22900?

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

Vulnerability in QNAP Qunetswitch

CVE-2026-22900

A use of hard-coded credentials vulnerability has been reported to affect QuNetSwitch. The remote attackers can then exploit the vulnerability to gain unauthorized access. We have already fixed the vulnerability in the following version: QuNetSwitch 2.0.5.0906 and later

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: 0.003 (22.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

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

Frequently asked questions

What is CVE-2026-22900?: CVE-2026-22900 is a critical-severity vulnerability in QNAP Qunetswitch, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-03-20.
How severe is CVE-2026-22900?: Critical severity. CVSS v3 base score is 9.8 out of 10.