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Exploitation reportedNot in CISA KEV yet

CVE-2023-39296

Exploitation reported by one source. First attested on 2024-03-24 by GCVE · shadowserver.

  • Published2024-01-05
  • WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC
  1. 2024-01-0517:15CVE publishedNVD
  2. 2024-03-2407:08Listed as exploited by GCVEGCVE
  3. 2024-03-2407:08Exploitation first reportedGCVE

Versions per branch

NVD
Qnap qts
BranchAffectedFixed in
5.1= 5.1.0.2348no fix published
5.1= 5.1.0.2399no fix published
5.1= 5.1.0.2418no fix published
5.1= 5.1.0.2444no fix published
5.1= 5.1.0.2466no fix published
5.1= 5.1.1.2491no fix published
5.1= 5.1.2.2533no fix published
Qnap quts hero
BranchAffectedFixed in
—= h5.1.0.2409no fix published
—= h5.1.0.2424no fix published
—= h5.1.0.2453no fix published
—= h5.1.0.2466no fix published
—= h5.1.1.2488no fix published
—= h5.1.2.2534no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA2 products

As qnap, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • QNAP Systems Inc. QTSother versions: not affected
    Affected
    • ≥ 5.1.x, < 5.1.3.2578 build 20231110fixed in 5.1.3.2578 build 20231110custom
  • QNAP Systems Inc. QuTS heroother versions: not affected
    Affected
    • ≥ h5.1.x, < h5.1.3.2578 build 20231110fixed in h5.1.3.2578 build 20231110custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-01-05

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2024-01-05
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xh38-hrrg-8cjv

Frequently asked questions

What is CVE-2023-39296?

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

Is CVE-2023-39296 actively exploited?

Active exploitation of CVE-2023-39296 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-39296?

CVE-2023-39296 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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