CVE-2023-39296

Name: CVE-2023-39296
Creator: NVD / NIST
Published: 2024-01-05T17:15:09.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.56%

Last modified Jun 17, 2026

CVE-2023-39296 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A prototype pollution vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to override existing attributes with ones that have incompatible type, which may lead to a crash via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 and later . EPSS estimates a 1.56% chance of exploitation in the next 30 days.

Description

A prototype pollution vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to override existing attributes with ones that have incompatible type, which may lead to a crash via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 and later

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.56%

72.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions	Update
Qnap	Qts	5.1.0.2348	Build 20230325
Qnap	Qts	5.1.0.2399	Build 20230515
Qnap	Qts	5.1.0.2418	Build 20230603
Qnap	Qts	5.1.0.2444	Build 20230629
Qnap	Qts	5.1.0.2466	Build 20230721
Qnap	Qts	5.1.1.2491	Build 20230815
Qnap	Qts	5.1.2.2533	Build 20230926
Qnap	Quts Hero	h5.1.0.2409	Build 20230525
Qnap	Quts Hero	h5.1.0.2424	Build 20230609
Qnap	Quts Hero	h5.1.0.2453	Build 20230708
Qnap	Quts Hero	h5.1.0.2466	Build 20230721
Qnap	Quts Hero	h5.1.1.2488	Build 20230812
Qnap	Quts Hero	h5.1.2.2534	Build 20230927

References

https://www.qnap.com/en/security-advisory/qsa-23-64Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-23-64Vendor Advisory

Timeline

Published: Jan 5, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39296?

How severe is CVE-2023-39296?

CVE-2023-39296 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.56% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39296?

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-2023-39296?

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

Scan your code now

Source: NVD / NIST