CVE-2018-0721

Name: CVE-2018-0721
Creator: NVD / NIST
Published: 2018-11-27T23:29:00.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 1.55%

Last modified Jun 17, 2026

CVE-2018-0721 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. Buffer Overflow vulnerability in NAS devices. QTS allows attackers to run arbitrary code. EPSS estimates a 1.55% chance of exploitation in the next 30 days.

Description

Buffer Overflow vulnerability in NAS devices. QTS allows attackers to run arbitrary code. This issue affects: QNAP Systems Inc. QTS version 4.2.6 and prior versions on build 20180711; version 4.3.3 and prior versions on build 20180725; version 4.3.4 and prior versions on build 20180710.

Metrics

CVSS 3.1

7.7/10

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

EPSS Probability

1.55%

72.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qnap	Qts	4.2.6
Qnap	Qts	4.3.3
Qnap	Qts	4.3.4

References

https://www.qnap.com/zh-tw/security-advisory/nas-201809-20Vendor Advisory
https://www.qnap.com/zh-tw/security-advisory/nas-201809-20Vendor Advisory

Timeline

Published: Nov 27, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0721?

How severe is CVE-2018-0721?

CVE-2018-0721 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 1.55% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0721?

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-2018-0721?

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

Scan your code now

Source: NVD / NIST