How severe is CVE-2021-44221?

CVE-2021-44221 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-44221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44221?

CVE-2021-44221 affects Siemens Simatic Easie Core Package. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44221?

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-2021-44221 published?

CVE-2021-44221 was published on 2022-07-12 and last updated on 2026-06-17.

CVE-2021-44221

CVE-2021-44221 is a high-severity vulnerability in Siemens Simatic Easie Core Package with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
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 affected systems do not properly validate input that is sent to the underlying message passing framework. This could allow an remote attacker to trigger a denial of service of the affected system.

Frequently asked questions

What is CVE-2021-44221?: A vulnerability has been identified in SIMATIC eaSie Core Package (All versions < V22.00). The affected systems do not properly validate input that is sent to the underlying message passing framework. This could allow an remote attacker to trigger a denial of service of the affected system.
How severe is CVE-2021-44221?: CVE-2021-44221 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-44221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44221?: CVE-2021-44221 affects Siemens Simatic Easie Core Package. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44221?: 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-2021-44221 published?: CVE-2021-44221 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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