CVE-2023-49621

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-09 · updated 2026-06-17
Weakness: CWE-1392

Description

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected application uses default credential with admin privileges. An attacker could use the credentials to gain complete control of the affected device.

Affected products

Siemens SIMATIC CN 4100: before 2.7 — fixed in 2.7

How to fix

Upgrade to a fixed version: Siemens SIMATIC CN 4100 2.7. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf

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