How severe is CVE-2021-40222?

CVE-2021-40222 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-40222 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40222?

CVE-2021-40222 affects Rittal Cmc Pu Iii 7030.000 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40222?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40222 published?

CVE-2021-40222 was published on 2021-09-09 and last updated on 2026-06-17.

CVE-2021-40222

CVE-2021-40222 is a high-severity vulnerability in Rittal Cmc Pu Iii 7030.000 Firmware with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Rittal Cmc Pu Iii 7030.000 Firmware
Published: 2021-09-09
Last modified: 2026-06-17

Description

Rittal CMC PU III Web management Version affected: V3.11.00_2. Version fixed: V3.17.10 is affected by a remote code execution vulnerablity. It is possible to introduce shell code to create a reverse shell in the PU-Hostname field of the TCP/IP Configuration dialog. Web application fails to sanitize user input on Network TCP/IP configuration page. This allows the attacker to inject commands as root on the device which will be executed once the data is received.

Frequently asked questions

What is CVE-2021-40222?: Rittal CMC PU III Web management Version affected: V3.11.00_2. Version fixed: V3.17.10 is affected by a remote code execution vulnerablity. It is possible to introduce shell code to create a reverse shell in the PU-Hostname field of the TCP/IP Configuration dialog. Web application fails to sanitize user input on Network TCP/IP configuration page. This allows the attacker to inject commands as root on the device which will be executed once the data is received.
How severe is CVE-2021-40222?: CVE-2021-40222 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-40222 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40222?: CVE-2021-40222 affects Rittal Cmc Pu Iii 7030.000 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40222?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40222 published?: CVE-2021-40222 was published on 2021-09-09 and last updated on 2026-06-17.

References

https://github.com/asang17/CVE-2021-RCE

Affected products (1)

cpe:2.3:o:rittal:cmc_pu_iii_7030.000_firmware:*:*:*:*:*:*:*:*

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CVE-2019-19393 — Medium (CVSS 6.1): The Web application on Rittal CMC PU III 7030.000 V3.00 V3.11.00_2 to V3.15.70_4 devices fails to sanitize user input…
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