What is CVE-2024-56336?

CVE-2024-56336 is a critical-severity vulnerability in Siemens Sinamics S200, classified under Improper Authentication. CVSS score: 9.8/10. Published 2025-03-11.

How severe is CVE-2024-56336?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2024-56336 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Siemens Sinamics S200

CVE-2024-56336

A vulnerability has been identified in SINAMICS S200 (All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02). The affected device contains an unlocked bootloader. This security oversight enable…

Vulnerability class: Broken Authentication

EPSS: 0.005 (39.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Siemens Sinamics S200 — versions 0

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

productcert@siemens.com

Frequently asked questions

What is CVE-2024-56336?: CVE-2024-56336 is a critical-severity vulnerability in Siemens Sinamics S200, classified under Improper Authentication. CVSS score: 9.8/10. Published 2025-03-11.
How severe is CVE-2024-56336?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2024-56336 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.