CVE-2020-5684

Name: CVE-2020-5684
Creator: NVD / NIST
Published: 2020-12-24T02:15:12.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2020-5684 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.33%

24.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Nec	Ism Server	>= 5.1, < 12.1

References

https://jpn.nec.com/security-info/secinfo/nv20-015.htmlVendor Advisory
https://jvn.jp/en/jp/JVN10100024/index.htmlThird Party Advisory
https://jpn.nec.com/security-info/secinfo/nv20-015.htmlVendor Advisory
https://jvn.jp/en/jp/JVN10100024/index.htmlThird Party Advisory

Timeline

Published: Dec 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5684?

How severe is CVE-2020-5684?

CVE-2020-5684 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5684?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5684?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST