Siemens SCALANCE LPE9403  – All CISA Advisories

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

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1. EXECUTIVE SUMMARY

• CVSS v4 8.5
• ATTENTION: Exploitable from adjacent network/low attack complexity
• Vendor: Siemens
• Equipment: SCALANCE LPE9403
• Vulnerabilities: Incorrect Permission Assignment for Critical Resource, Path Traversal: ‘…/…//’, Use of Uninitialized Variable, NULL Pointer Dereference, Out-of-bounds Read, Stack-based Buffer Overflow, Authentication Bypass Using an Alternate Path or Channel, Improper Neutralization of Special Elements used in an OS Command (‘OS Command Injection’), Cleartext Transmission of Sensitive Information

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could affect the confidentiality, integrity, and availability of affected devices.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

• SCALANCE LPE9403 (6GK5998-3GS00-2AC2): All versions (CVE-2025-40572, CVE-2025-40573, CVE-2025-40574, CVE-2025-40575, CVE-2025-40576, CVE-2025-40577, CVE-2025-40578, CVE-2025-40579, CVE-2025-40580)
• SCALANCE LPE9403 (6GK5998-3GS00-2AC2): All versions (CVE-2025-40581, CVE-2025-40582, CVE-2025-40583)

3.2 VULNERABILITY OVERVIEW

3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732

Affected devices do not properly assign permissions to critical resources. This could allow a non-privileged local attacker to access sensitive information stored on the device.

CVE-2025-40572 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40572. A base score of 6.8 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).

3.2.2 PATH TRAVERSAL: ‘…/…//’ CWE-35

Affected devices are vulnerable to path traversal attacks. This could allow a privileged local attacker to restore backups that are outside the backup folder.

CVE-2025-40573 has been assigned to this vulnerability. A CVSS v3 base score of 4.4 has been assigned; the CVSS vector string is
(CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40573. A base score of 6.7 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N).

3.2.3 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732

Affected devices do not properly assign permissions to critical resources. This could allow a non-privileged local attacker to interact with the backup manager service.

CVE-2025-40574 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2025-40574. A base score of 8.5 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.2.4 USE OF UNINITIALIZED VARIABLE CWE-457

Affected devices do not properly validate incoming Profinet packets. An unauthenticated remote attacker can exploit this flaw by sending a specially crafted malicious packet, which leads to a crash of the dcpd process.

CVE-2025-40575 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40574. A base score of 5.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N).

3.2.5 NULL POINTER DEREFERENCE CWE-476

Affected devices do not properly validate incoming Profinet packets. An unauthenticated remote attacker can exploit this flaw by sending a specially crafted malicious packet, which leads to a crash of the dcpd process.

CVE-2025-40576 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40576. A base score of 5.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N).

3.2.6 OUT-OF-BOUNDS READ CWE-125

Affected devices do not properly validate incoming Profinet packets. An unauthenticated remote attacker can exploit this flaw by sending a specially crafted malicious packet, which leads to a crash of the dcpd process.

CVE-2025-40577 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40577. A base score of 5.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N).

3.2.7 OUT-OF-BOUNDS READ CWE-125

Affected devices do not properly handle multiple incoming Profinet packets received in rapid succession. An unauthenticated remote attacker can exploit this flaw by sending multiple packets in a very short time frame, which leads to a crash of the dcpd process.

CVE-2025-40578 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2025-40578. A base score of 5.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N).

3.2.8 STACK-BASED BUFFER OVERFLOW CWE-121

Affected devices are vulnerable to a stack-based buffer overflow. This could allow a non-privileged local attacker to execute arbitrary code on the device or to cause a denial of service condition.

CVE-2025-40579 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2025-40579. A base score of 5.4 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.2.9 STACK-BASED BUFFER OVERFLOW CWE-121

Affected devices are vulnerable to a stack-based buffer overflow. This could allow a non-privileged local attacker to execute arbitrary code on the device or to cause a denial of service condition.

CVE-2025-40580 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2025-40580. A base score of 5.4 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.2.10 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL CWE-288

Affected devices are vulnerable to an authentication bypass. This could allow a non-privileged local attacker to bypass the authentication of the SINEMA Remote Connect Edge Client, and to read and modify the configuration parameters.

CVE-2025-40581 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40581. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N).

3.2.11 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78

Affected devices do not properly sanitize configuration parameters. This could allow a non-privileged local attacker to execute root commands on the device.

CVE-2025-40582 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2025-40582. A base score of 8.5 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.2.12 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319

Affected devices do transmit sensitive information in cleartext. This could allow a privileged local attacker to retrieve this sensitive information.

CVE-2025-40583 has been assigned to this vulnerability. A CVSS v3 base score of 4.4 has been assigned; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).

A CVSS v4 score has also been calculated for CVE-2025-40583. A base score of 6.7 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Luca Borzacchiello from Nozomi Networks reported these vulnerabilities to Siemens.
Siemens reported these vulnerabilities to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

• SCALANCE LPE9403 (6GK5998-3GS00-2AC2): Currently no fix is available
• SCALANCE LPE9403 (6GK5998-3GS00-2AC2)(CVE-2025-40572, CVE-2025-40573, CVE-2025-40574, CVE-2025-40579, CVE-2025-40580, CVE-2025-40581, CVE-2025-40582, CVE-2025-40583): Restrict access to authorized and trusted personal only
• SCALANCE LPE9403 (6GK5998-3GS00-2AC2)(CVE-2025-40575, CVE-2025-40576, CVE-2025-40577, CVE-2025-40578): Disable the Profinet Discovery and Configuration Protocol (DCP) service
• SCALANCE LPE9403 (6GK5998-3GS00-2AC2)(CVE-2025-40582): Only use trusted SINEMA Remote Connect Servers

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-327438 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

• Do not click web links or open attachments in unsolicited email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.

5. UPDATE HISTORY

• May 15, 2025: Initial Republication of Siemens SSA-327438

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