CVE-2020-5684

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-24 · updated 2026-06-17
Weakness: CWE-295

Description

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.

Affected products

NEC Ism Server: from 5.1 before 12.1 — fixed in 12.1

How to fix

Upgrade to a fixed version: NEC Ism Server 12.1. Check the vendor advisory for mitigations.

References

https://jpn.nec.com/security-info/secinfo/nv20-015.html
https://jvn.jp/en/jp/JVN10100024/index.html
https://jpn.nec.com/security-info/secinfo/nv20-015.html
https://jvn.jp/en/jp/JVN10100024/index.html

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