ICSA-25-072-05: Siemens SINAMICS S200

Summary

A specific range of produced SINAMICS S200 devices contains an unlocked bootloader vulnerability that could allow an attacker to download untrusted firmware that could damage or compromise the device. For delivered products listed below Siemens recommends countermeasures. CVE-2024-56336: The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted firmware. The intrinsic security features designed to protect against data manipulation and unauthorized access are compromised when the bootloader is not secured.

Advisory Details CISA ICS CSAF feed

Advisory ID: ICSA-25-072-05
Status: Final · version 1
Initial release: 2025-03-11
Last revised: 2025-03-11
Vendor: Siemens
Critical infrastructure sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities
Deployed: Worldwide
Vendor headquarters: Germany

Republished vendor advisory. This CISA CSAF advisory was converted from Siemens ProductCERT's CSAF advisory.

General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

Credit: Siemens ProductCERT

Affected products (1)

SINAMICS S200 — all versions

From CISA's machine-readable CSAF 2.0 advisory (JSON).

Vulnerabilities as Stated by the Advisory

CVE	Weakness	CVSS v3	Details
CVE-2024-56336	CWE-287 Improper Authentication	9.8 Critical	CVE-2024-56336 The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted firmware. The intrinsic security features designed to protect against data manipulation and unauthorized access are compromised when the bootloader is not secured. Vendor fix: Follow the general security recomendations and apply defense in depth Vendor fix: Contact your local customer service for further support Affected, fixed & timeline Affected: SINAMICS S200 all versions

Scores and weakness types are as CISA or the republishing vendor stated them in this advisory; the linked CVE pages carry the independently enriched CVSS and SSVC assessments.

News Coverage

No coverage found in monitored research blogs or news feeds.

CVEs Referenced in This Publication

CVE	CVSS	Affected
CVE-2024-56336	9.8 Critical	Siemens SINAMICS S200 A vulnerability has been identified in SINAMICS S200 (All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number i…

Named by the advisory itself. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Siemens 2 KEV

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.

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