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1. EXECUTIVE SUMMARY

• CVSS v4 4.6
• ATTENTION: Low attack complexity
• Vendor: Schneider Electric
• Equipment: EcoStruxure Power Build Rapsody
• Vulnerability: Stack-based Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to achieve arbitrary code execution on the affected device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Schneider Electric product is affected:

• EcoStruxure Power Build Rapsody: v2.7.12 FR and prior

3.2 VULNERABILITY OVERVIEW

3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121

Stack-based Buffer Overflow vulnerability exists that could cause local attackers being able to exploit these issues to potentially execute arbitrary code while the end user opens a malicious project file (SSD file) provided by the attacker.

CVE-2025-3916 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L).

A CVSS v4 score has also been calculated for CVE-2025-3916. A base score of 4.6 has been calculated; the CVSS vector string is (AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Energy
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: France

3.4 RESEARCHER

Michael Heinzl reported this vulnerability to Schneider Electric.
Schneider Electric reported this vulnerability to CISA.

4. MITIGATIONS

Schneider Electric recommends users take the following actions:

• Update to Version v2.8.1 FR of EcoStruxure Power Build-Rapsody, which includes a fix for this vulnerability. Reboot after installing the new version.

Additionally, Schneider Electric recommends that if users choose not to apply the remediation provided above, the following mitigations should be applied immediately to reduce the risk of exploitation:

• Store the project files in a secure storage and restrict access to only trusted users.
• When exchanging files over the network, use secure communication protocols.
• Encrypt project files when stored.
• Only open project files received from trusted sources.
• Compute a hash of the project files and regularly check the consistency of this hash to verify the integrity before usage.
• Harden the workstation running EcoStruxure™ Power Build Rapsody.
• To ensure you are informed of all updates, including details on affected products and remediation plans, subscribe to Schneider Electric's security notification service here: https://www.se.com/en/work/support/cybersecurity/security-notifications.jsp

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, 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), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is 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/ics. 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/ics 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 this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.

5. UPDATE HISTORY

• June 3, 2025: Initial Republication of Schneider Electric SEVD-2025-133-03