CVE-2021-20703 is a critical buffer overflow vulnerability (CWE-120) affecting NEC CLUSTERPRO X and EXPRESSCLUSTER X products, including their SingleServerSafe versions, all at or below 4.3 for Windows. This flaw allows an unauthenticated attacker to achieve remote code execution over the network with low attack complexity. With a CVSS score of 9.8 (CRITICAL), successful exploitation could lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0, <= 4.3CPE matchmatch criteria | cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* | ||
>= 1.0, <= 4.3CPE matchmatch criteria | cpe:2.3:a:nec:clusterpro_x_singleserversafe:*:*:*:*:*:windows:*:* | ||
>= 1.0, <= 4.3CPE matchmatch criteria | cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* | ||
>= 1.0, <= 4.3CPE matchmatch criteria | cpe:2.3:a:nec:expresscluster_x_singleserversafe:*:*:*:*:*:windows:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.