How severe is CVE-2023-39544?

CVE-2023-39544 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-39544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39544?

CVE-2023-39544 primarily affects Nec Expresscluster X. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-39544?

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.

When was CVE-2023-39544 published?

CVE-2023-39544 was published on 2023-11-17 and last updated on 2026-06-17.

CVE-2023-39544

CVE-2023-39544 is a high-severity vulnerability in Nec Expresscluster X with a CVSS 3.x base score of 8.8. 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-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Nec Expresscluster X
Published: 2023-11-17
Last modified: 2026-06-17

Description

CLUSTERPRO X Ver5.1 and earlier and EXPRESSCLUSTER X 5.1 and earlier, CLUSTERPRO X SingleServerSafe 5.1 and earlier, EXPRESSCLUSTER X SingleServerSafe 5.1 and earlier allows a attacker to log in to the product may execute an arbitrary command.

Frequently asked questions

What is CVE-2023-39544?: CLUSTERPRO X Ver5.1 and earlier and EXPRESSCLUSTER X 5.1 and earlier, CLUSTERPRO X SingleServerSafe 5.1 and earlier, EXPRESSCLUSTER X SingleServerSafe 5.1 and earlier allows a attacker to log in to the product may execute an arbitrary command.
How severe is CVE-2023-39544?: CVE-2023-39544 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-39544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39544?: CVE-2023-39544 primarily affects Nec Expresscluster X. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-39544?: 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.
When was CVE-2023-39544 published?: CVE-2023-39544 was published on 2023-11-17 and last updated on 2026-06-17.

References

https://jpn.nec.com/security-info/secinfo/nv23-009_en.html

Affected products (52)

cpe:2.3:a:nec:expresscluster_x:1.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:1.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:2.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:2.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:2.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:2.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:3.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:3.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:3.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:3.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:3.2:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:3.2:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:3.3:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:3.3:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:4.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:4.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:4.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:4.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:4.2:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:4.2:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:4.3:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:4.3:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:5.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:5.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x:5.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x:5.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:1.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:1.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:2.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:2.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:2.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:2.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.0:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.0:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.1:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.1:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.2:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.2:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.3:*:*:*:*:linux:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:3.3:*:*:*:*:windows:*:*

More vulnerabilities in Nec Expresscluster X

CVE-2022-34825 — Critical (CVSS 9.8): Uncontrolled Search Path Element in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for Windows and…
CVE-2022-34824 — Critical (CVSS 9.8): Weak File and Folder Permissions vulnerability in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for…
CVE-2022-34823 — Critical (CVSS 9.8): Buffer overflow vulnerability in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for Windows and…
CVE-2022-34822 — Critical (CVSS 9.8): Path traversal vulnerability in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for Windows and earlier,…
CVE-2021-20704 — Critical (CVSS 9.8): Buffer overflow vulnerability in the compatible API with previous versions CLUSTERPRO X 4.3 for Windows and earlier,…
CVE-2021-20703 — Critical (CVSS 9.8): Buffer overflow vulnerability in the Transaction Server CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3…

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