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CVE-2021-44221

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-12 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Siemens SIMATIC eaSie Core Package: before 22.00 — fixed in 22.00

How to fix

Upgrade to a fixed version: Siemens SIMATIC eaSie Core Package 22.00. Check the vendor advisory for mitigations.

References

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

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