How severe is CVE-2022-34823?

CVE-2022-34823 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-34823 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-34823?

CVE-2022-34823 primarily affects Nec Expresscluster X. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-34823?

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

When was CVE-2022-34823 published?

CVE-2022-34823 was published on 2022-11-08 and last updated on 2026-06-17.

CVE-2022-34823

CVE-2022-34823 is a critical-severity vulnerability in Nec Expresscluster X with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Nec Expresscluster X
Published: 2022-11-08
Last modified: 2026-06-17

Description

Buffer overflow vulnerability in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for Windows and earlier, CLUSTERPRO X 5.0 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 5.0 SingleServerSafe for Windows and earlier allows a remote unauthenticated attacker to overwrite existing files on the file system and to potentially execute arbitrary code.

Frequently asked questions

What is CVE-2022-34823?: Buffer overflow vulnerability in CLUSTERPRO X 5.0 for Windows and earlier, EXPRESSCLUSTER X 5.0 for Windows and earlier, CLUSTERPRO X 5.0 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 5.0 SingleServerSafe for Windows and earlier allows a remote unauthenticated attacker to overwrite existing files on the file system and to potentially execute arbitrary code.
How severe is CVE-2022-34823?: CVE-2022-34823 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-34823 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-34823?: CVE-2022-34823 primarily affects Nec Expresscluster X. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-34823?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-34823 published?: CVE-2022-34823 was published on 2022-11-08 and last updated on 2026-06-17.

References

https://jpn.nec.com/security-info/secinfo/nv22-014_en.html

Affected products (2)

cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:*
cpe:2.3:a:nec:expresscluster_x_singleserversafe:*:*:*:*:*: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-2022-34822 — 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…
CVE-2021-20702 — Critical (CVSS 9.8): Buffer overflow vulnerability in the Transaction Server CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3…

All CVEs affecting Nec Expresscluster X →

Other CWE-120 (Classic Buffer Overflow) vulnerabilities

CVE-2025-48611 — Critical (CVSS 10.0): In DeviceId of DeviceId.java, there is a possible desync in persistence due to a missing bounds check. This could lead…
CVE-2026-24823 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in FASTSHIFT…
CVE-2026-24810 — Critical (CVSS 10.0): Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in rethinkdb (src/cjson modules).…
CVE-2026-24800 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in tildearrow…
CVE-2025-9962 — Critical (CVSS 10.0): A buffer overflow vulnerability in Novakon P series allows attackers to gain root permission without prior…
CVE-2010-10016 — Critical (CVSS 10.0): BS.Player version 2.57 (build 1051) contains a vulnerability in its playlist import functionality. When processing .m3u…

Browse all CWE-120 (Classic Buffer Overflow) vulnerabilities →