CVE-2023-23363

Name: CVE-2023-23363
Creator: NVD / NIST
Published: 2023-09-22T04:15:53.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.77%

Last modified Jun 17, 2026

CVE-2023-23363 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 4.3.6.2441 build 20230621 and later QTS 4.3.3.2420 build 20230621 and later QTS 4.2.6 build 20230621 and later QTS 4.3.4.2451 build 20230621 and later . EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 4.3.6.2441 build 20230621 and later QTS 4.3.3.2420 build 20230621 and later QTS 4.2.6 build 20230621 and later QTS 4.3.4.2451 build 20230621 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

0.77%

50.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qnap	Qts	>= 4.3.3, < 4.3.3.2420
Qnap	Qts	>= 4.3.4, < 4.3.4.245
Qnap	Qts	>= 4.3.6, < 4.3.6.2441

References

https://www.qnap.com/en/security-advisory/qsa-23-25Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-23-25Vendor Advisory

Timeline

Published: Sep 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-23363?

How severe is CVE-2023-23363?

CVE-2023-23363 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.

How do I fix CVE-2023-23363?

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-2023-23363?

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

Scan your code now

Source: NVD / NIST