CVE-2021-3723

Name: CVE-2021-3723
Creator: NVD / NIST
Published: 2021-11-12T22:15:08.057+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.94%

Last modified Jun 17, 2026

CVE-2021-3723 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A command injection vulnerability was reported in the Integrated Management Module (IMM) of legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers that could allow the execution of operating system commands over an authenticated SSH or Telnet session.. EPSS estimates a 1.94% chance of exploitation in the next 30 days.

Description

A command injection vulnerability was reported in the Integrated Management Module (IMM) of legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers that could allow the execution of operating system commands over an authenticated SSH or Telnet session.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.94%

77.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ibm	System X3550 M3 Firmware	All versions
Ibm	System X3650 M3 Firmware	All versions

References

https://support.lenovo.com/us/en/product_security/LEN-66347Third Party Advisory
https://support.lenovo.com/us/en/product_security/LEN-66347Third Party Advisory

Timeline

Published: Nov 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3723?

How severe is CVE-2021-3723?

CVE-2021-3723 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3723?

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-2021-3723?

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

Scan your code now

Source: NVD / NIST