Siemens 2025: Critical DLL Hijacking Flaw Exposes Manufacturing Software
Executive Summary
In November 2025, Siemens disclosed a vulnerability (CVE-2025-40827) in its Software Center and Solid Edge products, affecting versions prior to 3.5 and V225.0 Update 10, respectively. The flaw, rooted in uncontrolled search path element (CWE-427), allows local attackers to execute arbitrary code via DLL hijacking—placing crafted DLLs on vulnerable systems. Although exploitation requires local access and some user interaction, compromise could lead to full system takeover in manufacturing environments globally. Siemens responded by advising immediate updates and enhanced network protections.
This incident underscores the ongoing risks posed by software supply chain vulnerabilities and underscores the importance of timely patching in industrial environments. It highlights how attackers continue targeting widely deployed engineering software with low-complexity, high-impact exploits, especially as operational technology environments see increased convergence with IT infrastructures.
Why This Matters Now
The urgency of this issue lies in attackers' persistent focus on exploiting software weaknesses in industrial and manufacturing environments. As more control systems connect to broader networks, vulnerabilities like DLL hijacking amplify business disruption and downtime risks, making robust patch management and environment hardening a current critical priority.
Attack Path Analysis
An attacker gains initial local access to a system running Siemens Software Center or Solid Edge by delivering a malicious DLL file to a directory used by the vulnerable application. Once the application is executed, the DLL is loaded, granting the attacker execution, potentially enabling privilege escalation to gain further access. The attacker then leverages any available trust relationships or open internal communications for lateral movement within the network. They attempt to establish command and control channels, possibly using covert outbound communication. Data of interest is exfiltrated via allowed egress paths or internal transfers. Finally, the attacker may deploy destructive actions or manipulate critical assets, impacting operational integrity.
Kill Chain Progression
Initial Compromise
Description
An attacker places a malicious DLL in a directory searched by Siemens Software Center or Solid Edge, leveraging the uncontrolled search path element vulnerability (DLL hijacking) when a user runs the application.
Related CVEs
CVE-2025-40827
CVSS 7.8A DLL hijacking vulnerability in Siemens Software Center and Solid Edge allows local attackers to execute arbitrary code by placing a crafted DLL file on the system.
Affected Products:
Siemens Software Center – < 3.5
Siemens Solid Edge SE2025 – < V225.0 Update 10
Exploit Status:
no public exploitCVE-2025-40744
CVSS 7.5Improper certificate validation in Solid Edge SE2025 allows unauthenticated remote attackers to perform man-in-the-middle attacks.
Affected Products:
Siemens Solid Edge SE2025 – < V225.0 Update 11
Exploit Status:
no public exploit
MITRE ATT&CK® Techniques
DLL Search Order Hijacking
Process Injection
System Information Discovery
Registry Run Keys / Startup Folder
Impair Defenses
Command and Scripting Interpreter
File Deletion
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Security Vulnerability Identification and Risk Assessment
Control ID: 6.1.1
NIS2 Directive – Technical and Organizational Measures for Risk Management
Control ID: Article 21(2)
NYDFS 23 NYCRR 500 – Cybersecurity Policy
Control ID: 500.03
DORA – Digital Operational Resilience Act – ICT Risk Management
Control ID: Article 8
CISA ZTMM 2.0 – Application Vulnerability Management
Control ID: Pillar 4: Applications and Workload – Control 2
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Critical Manufacturing
Siemens Software Center and Solid Edge DLL hijacking vulnerability enables arbitrary code execution, directly impacting manufacturing operations and industrial control systems worldwide.
Automotive
CAD software vulnerabilities in Solid Edge threaten automotive design workflows, potentially compromising vehicle development processes and intellectual property through malicious code execution.
Aviation/Aerospace
Engineering design software exploitation could compromise aerospace component development, affecting safety-critical systems design and regulatory compliance in aviation manufacturing environments.
Defense/Space
Uncontrolled search path elements in industrial design software pose significant risks to defense manufacturing, potentially enabling espionage through compromised engineering workflows.
Sources
- Siemens Software Center and Solid Edgehttps://www.cisa.gov/news-events/ics-advisories/icsa-25-317-17Verified
- SSA-365596: Uncontrolled Search Path Element Vulnerability in Siemens Software Center and Solid Edgehttps://cert-portal.siemens.com/productcert/html/ssa-365596.htmlVerified
- SSA-522291: Improper Certificate Validation Vulnerability in Solid Edgehttps://cert-portal.siemens.com/productcert/html/ssa-522291.htmlVerified
- NVD - CVE-2025-40827https://nvd.nist.gov/vuln/detail/CVE-2025-40827Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Implementing Zero Trust segmentation, workload isolation, inline threat detection, and rigorous egress controls would have limited the attacker's ability to move laterally, establish command channels, or exfiltrate data across hybrid or cloud environments. CNSF controls specifically restrict uncontrolled internal communications, enforce strict application-level policies, and provide visibility to detect both the DLL hijack and subsequent attacker behavior.
Control: Threat Detection & Anomaly Response
Mitigation: Rapid detection of anomalous DLL loading or suspicious process behaviors.
Control: Zero Trust Segmentation
Mitigation: Access scopes remain tightly limited post-compromise.
Control: East-West Traffic Security
Mitigation: Lateral movement attempts are blocked and flagged.
Control: Egress Security & Policy Enforcement
Mitigation: Outbound C2 attempts are detected and blocked.
Control: Encrypted Traffic (HPE) & Cloud Firewall (ACF)
Mitigation: Data exfiltration paths are monitored, restricted, or encrypted in transit.
Security teams have the necessary visibility to contain and recover swiftly.
Impact at a Glance
Affected Business Functions
- Product Development
- Design Management
Estimated downtime: 3 days
Estimated loss: $50,000
Potential exposure of sensitive design and manufacturing data due to unauthorized code execution.
Recommended Actions
Key Takeaways & Next Steps
- • Upgrade vulnerable Siemens software to the latest secure versions without delay.
- • Implement Zero Trust Segmentation and identity-based microsegmentation to confine compromised processes and block lateral movement.
- • Enforce rigorous east-west and outbound (egress) policy controls to prevent C2 and data exfiltration.
- • Deploy advanced threat detection and anomaly response for DLL hijacking and privilege misuse patterns.
- • Maintain centralized, real-time cloud visibility and automated incident response for rapid detection and containment across environments.
