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CVE-2023-49621

Siemens Simatic Cn 4100 Firmware vulnerability

9.8 CRITICALEPSS 0.60%
  1. Published9 Jan 2024

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Siemens Simatic Cn 4100 Firmware< 2.7

Remediation

Fixed in
Siemens Simatic Cn 4100 Firmware≥ 2.7

References

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Frequently asked

Is CVE-2023-49621 being actively exploited?

CVE-2023-49621 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.60%.

How severe is CVE-2023-49621?

CVE-2023-49621 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.60% probability of exploitation.

Which products are affected by CVE-2023-49621?

Affected products include Siemens Simatic Cn 4100 Firmware.

How do I fix CVE-2023-49621?

Upgrade affected software to a fixed version, for example Siemens Simatic Cn 4100 Firmware 2.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-49621 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.