Buffer overflow in NEC Corporation CLUSTERPRO X
Priority MEDIUM 46CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Buffer overflow vulnerability in the Disk Agent CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier allows attacker to remote code execution via a network.
Why it matters now
EPSS 0.02142 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NEC Corporation | CLUSTERPRO X | CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier | — | No fix listed | CNA |
- CLUSTERPRO X VendorNEC Corporation Affected CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* | 1.0 – 4.3 | Vulnerable | NEC Corporation |
| cpe:2.3:a:nec:clusterpro_x_singleserversafe:*:*:*:*:*:windows:*:* | 1.0 – 4.3 | Vulnerable | NEC Corporation |
| cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* | 1.0 – 4.3 | Vulnerable | NEC Corporation |
| cpe:2.3:a:nec:expresscluster_x_singleserversafe:*:*:*:*:*:windows:*:* | 1.0 – 4.3 | Vulnerable | NEC Corporation |
- cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* Versions 1.0 – 4.3 Vulnerable ·NEC Corporation
- cpe:2.3:a:nec:clusterpro_x_singleserversafe:*:*:*:*:*:windows:*:* Versions 1.0 – 4.3 Vulnerable ·NEC Corporation
- cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* Versions 1.0 – 4.3 Vulnerable ·NEC Corporation
- cpe:2.3:a:nec:expresscluster_x_singleserversafe:*:*:*:*:*:windows:*:* Versions 1.0 – 4.3 Vulnerable ·NEC Corporation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20700
- 2026-10-03 Alias added: GHSA-4g8c-wjf2-3f87
References
More NEC Corporation Clusterpro X vulnerabilities
- TI-2021-03930 Buffer overflow in NEC Corporation CLUSTERPRO X CVSS 3.1CRITICAL 9.8
- TI-2021-03929 Buffer overflow in NEC Corporation CLUSTERPRO X CVSS 3.1CRITICAL 9.8
- TI-2021-03928 Buffer overflow in NEC Corporation CLUSTERPRO X CVSS 3.1CRITICAL 9.8
- TI-2021-03927 Buffer overflow in NEC Corporation CLUSTERPRO X CVSS 3.1CRITICAL 9.8
- TI-2021-03933 Improper input validation in NEC Corporation CLUSTERPRO X CVSS 3.1HIGH 7.5
- TI-2021-03932 Improper input validation in NEC Corporation CLUSTERPRO X CVSS 3.1HIGH 7.5
Sources
- CVE-2021-20700 · CVE Program
- CVE-2021-20700 · NVD
- FIRST EPSS
- GHSA-4g8c-wjf2-3f87 · GitHub Advisory Database · CC BY 4.0
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