What’s Vulnerable › Vulnerabilities

CVE-2021-44222

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% 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-306

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.

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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