How severe is CVE-2021-44222?

CVE-2021-44222 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-44222 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44222?

CVE-2021-44222 affects Siemens Simatic Easie Core Package. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44222?

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

When was CVE-2021-44222 published?

CVE-2021-44222 was published on 2022-07-12 and last updated on 2026-06-17.

CVE-2021-44222

CVE-2021-44222 is a critical-severity vulnerability in Siemens Simatic Easie Core Package with a CVSS 3.x base score of 9.1. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Siemens Simatic Easie Core Package
Published: 2022-07-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SIMATIC eaSie Core Package (All versions < V22.00). The underlying MQTT service of affected systems does not perform authentication in the default configuration. This could allow an unauthenticated remote attacker to send arbitrary messages to the service and thereby issue arbitrary requests in the affected system.

Frequently asked questions

What is CVE-2021-44222?: A vulnerability has been identified in SIMATIC eaSie Core Package (All versions < V22.00). The underlying MQTT service of affected systems does not perform authentication in the default configuration. This could allow an unauthenticated remote attacker to send arbitrary messages to the service and thereby issue arbitrary requests in the affected system.
How severe is CVE-2021-44222?: CVE-2021-44222 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-44222 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44222?: CVE-2021-44222 affects Siemens Simatic Easie Core Package. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44222?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-44222 published?: CVE-2021-44222 was published on 2022-07-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-580125.pdf

Affected products (1)

cpe:2.3:a:siemens:simatic_easie_core_package:*:*:*:*:*:*:*:*

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