How severe is CVE-2023-51364?

CVE-2023-51364 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-51364 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51364?

CVE-2023-51364 primarily affects Qnap Qts. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-51364?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-51364 have an EU (EUVD) identifier?

Yes. CVE-2023-51364 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56085.

When was CVE-2023-51364 published?

CVE-2023-51364 was published on 2024-04-26 and last updated on 2026-06-17.

CVE-2023-51364

CVE-2023-51364 is a high-severity vulnerability in Qnap Qts with a CVSS 3.x base score of 8.7. Its EPSS exploit-prediction score of 42% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 42% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56085
Weakness: CWE-22
Affected product: Qnap Qts
Published: 2024-04-26
Last modified: 2026-06-17

Description

A path traversal vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to read the contents of unexpected files and expose sensitive data via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QTS 4.5.4.2627 build 20231225 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTS hero h4.5.4.2626 build 20231225 and later QuTScloud c5.1.5.2651 and later

Frequently asked questions

What is CVE-2023-51364?: A path traversal vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to read the contents of unexpected files and expose sensitive data via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QTS 4.5.4.2627 build 20231225 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTS hero h4.5.4.2626 build 20231225 and later QuTScloud c5.1.5.2651 and later
How severe is CVE-2023-51364?: CVE-2023-51364 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-51364 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51364?: CVE-2023-51364 primarily affects Qnap Qts. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-51364?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-51364 have an EU (EUVD) identifier?: Yes. CVE-2023-51364 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56085.
When was CVE-2023-51364 published?: CVE-2023-51364 was published on 2024-04-26 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-24-14

Affected products (7)

cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:4.5.4.2627:-:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:5.1.4.2596:-:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h4.5.4.2626:-:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:h5.1.3.2578:-:*:*:*:*:*:*
cpe:2.3:o:qnap:qutscloud:*:*:*:*:*:*:*:*

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