CVE-2021-38679

Name: CVE-2021-38679
Creator: NVD / NIST
Published: 2022-02-11T14:15:08.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-38679 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An improper authentication vulnerability has been reported to affect QNAP NAS running Kazoo Server. If exploited, this vulnerability allows attackers to compromise the security of the system. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

An improper authentication vulnerability has been reported to affect QNAP NAS running Kazoo Server. If exploited, this vulnerability allows attackers to compromise the security of the system. We have already fixed this vulnerability in the following versions of Kazoo Server: Kazoo Server 4.11.22 and later

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.73%

49.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qnap	Kazoo Server	< 4.11.22

References

https://www.qnap.com/en/security-advisory/qsa-22-01Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-22-01Vendor Advisory

Timeline

Published: Feb 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38679?

How severe is CVE-2021-38679?

CVE-2021-38679 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38679?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38679?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST