CVE-2021-40222Public exploitNetwork attack vector

Admin-level root command execution via PU-Hostname injection

Published Sep 9, 2021 · Updated Aug 4, 2024

OS command injection in Rittal CMC PU III Web management 3.11.00_2 allows remote authenticated users to execute commands as root. The Network TCP/IP configuration page accepts shell metacharacters in the PU-Hostname field and passes the stored value to a root shell without sanitization. Administrative access through a valid or hijacked management session is required; successful exploitation can establish a reverse shell or persistent device backdoor.

CVSS severity7.2
High
EPSS probability4.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Rittal CMC PU III Web management 3.11.00_2 allows remote authenticated users to execute commands as root. The Network TCP/IP configuration page accepts shell metacharacters in the PU-Hostname field and passes the stored value to a root shell without sanitization. Administrative access through a valid or hijacked management session is required; successful exploitation can establish a reverse shell or persistent device backdoor.

The record

CVE
CVE-2021-40222
Published
Sep 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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