CVE-2023-49621

Name: CVE-2023-49621
Creator: NVD / NIST
Published: 2024-01-09T10:15:20.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2023-49621 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.60%

44.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1392

Affected Software

Vendor	Product	Versions
Siemens	Simatic Cn 4100 Firmware	< 2.7

References

https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdfPatch, Vendor Advisory

Timeline

Published: Jan 9, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-49621?

How severe is CVE-2023-49621?

CVE-2023-49621 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2023-49621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-49621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST