iSM client versions from V5.1 prior to V12.1 running on NEC Storage Manager or NEC Storage Manager Express does not verify a server certifi…

published 2020-12-24 5y ago modified 2026-06-17 4mo ago also EUVD-2020-26843

cvss: 4.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits: 0; none known

iSM client versions from V5.1 prior to V12.1 running on NEC Storage Manager or NEC Storage Manager Express does not verify a server certificate properly, which allows a man-in-the-middle attacker to eavesdrop on an encrypted communication or alter the communication via a crafted certificate.

Patch / fix

fixed in 1

nec ism_server 12.1

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Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	2.0	5.8	AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

NEC Corporation Management software for NEC Storage disk array system

Classification

Weakness

CWE-295 Improper Certificate Validation

References

jpn.nec.com /security-info/secinfo/nv20-015.html
vendor-advisory
jvn.jp /en/jp/JVN10100024/index.html
third-party-advisory

Sources

CVE List CVE-2020-5684
NVD CVE-2020-5684

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