How severe is CVE-2023-51367?

CVE-2023-51367 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2023-51367 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51367?

CVE-2023-51367 primarily affects Qnap Qts. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-51367?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-51367 have an EU (EUVD) identifier?

Yes. CVE-2023-51367 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56088.

When was CVE-2023-51367 published?

CVE-2023-51367 was published on 2024-09-06 and last updated on 2026-06-17.

CVE-2023-51367

CVE-2023-51367 is a medium-severity vulnerability in Qnap Qts with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56088
Weakness: CWE-120
Affected product: Qnap Qts
Published: 2024-09-06
Last modified: 2026-06-17

Description

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.6.2722 build 20240402 and later QuTS hero h5.1.6.2734 build 20240414 and later

Frequently asked questions

What is CVE-2023-51367?: A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.6.2722 build 20240402 and later QuTS hero h5.1.6.2734 build 20240414 and later
How severe is CVE-2023-51367?: CVE-2023-51367 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2023-51367 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51367?: CVE-2023-51367 primarily affects Qnap Qts. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-51367?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-51367 have an EU (EUVD) identifier?: Yes. CVE-2023-51367 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56088.
When was CVE-2023-51367 published?: CVE-2023-51367 was published on 2024-09-06 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-24-20

Affected products (21)

cpe:2.3:o:qnap:qts:5.1.0.2348:build_20230325:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.0.2399:build_20230515:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.0.2418:build_20230603:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.0.2444:build_20230629:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.0.2466:build_20230721:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.1.2491:build_20230815:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.2.2533:build_20230926:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.3.2578:build_20231110:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.4.2596:build_20231128:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.5.2645:build_20240116:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.5.2679:build_20240219:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.0.2409:build_20230525:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.0.2424:build_20230609:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.0.2453:build_20230708:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.0.2466:build_20230721:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.1.2488:build_20230812:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.2.2534:build_20230927:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.3.2578:build_20231110:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.4.2596:build_20231128:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.5.2647:build_20240118:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.5.2680:build_20240220:*:*:*:*:*:*

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