NEC CLUSTERPRO X flaw allows unauthenticated RCE
A critical OS command injection flaw in NEC's CLUSTERPRO X/EXPRESSCLUSTER X clustering software lets attackers run arbitrary commands via crafted network packets without authentication.
Sourceipa.go.jp — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
IPA and JVN published an advisory for CVE-2025-11546, an OS command injection vulnerability affecting NEC's CLUSTERPRO X and EXPRESSCLUSTER X clustering software for Linux. The flaw carries a CVSS v3 score of 9.8 and allows a remote attacker to execute arbitrary OS commands without authentication by sending specially crafted network packets to the affected product.
The vulnerability affects a wide range of versions across both product lines, from 4.0 through 5.2, including the SingleServerSafe variants. Given that clustering software is typically deployed in high-availability enterprise environments to manage failover for critical business systems, successful exploitation could lead to full compromise of underlying infrastructure supporting mission-critical applications.
NEC has released updated versions and workarounds to mitigate the issue. IPA recommends affected organizations update to the latest version or apply the vendor-provided workaround immediately, and to consult NEC directly for further technical details. No evidence of active exploitation was reported in the advisory.
Mentioned in this report
Source reporting: https://www.ipa.go.jp/security/security-alert/2025/20251107-jvn.html
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