---
title: "Siemens gWAP Vulnerability Exposes Systems to Remote Code Execution"
short_title: "Critical RCE flaw in Siemens gWAP"
description: "Siemens gWAP versions below 3.1.1 are vulnerable to remote code execution via a prototype pollution flaw in Axios. Update now to secure critical systems."
author: "Vitus"
date: 2024-10-02
categories: [Cybersecurity, Vulnerabilities]
tags: [siemens, rce, cve-2026-40175, prototype-pollution, industrial-security]
score: 0.85
cve_ids: [CVE-2026-40175]
---
## TL;DR
Siemens gWAP, a web applications publisher for industrial systems, is affected by a critical remote code execution (RCE) vulnerability (CVE-2026-40175) due to a prototype pollution flaw in the Axios HTTP client library. Attackers can exploit this flaw to execute arbitrary code on vulnerable systems. Siemens has released version 3.1.1 to patch the issue—users must update immediately to mitigate risks.
Main Content
### Introduction
Industrial control systems (ICS) are increasingly targeted by cybercriminals due to their critical role in manufacturing and infrastructure. Siemens gPROMS Web Applications Publisher (gWAP), a widely used tool for deploying web-based applications in industrial environments, has been found vulnerable to a severe RCE flaw. The vulnerability, tracked as CVE-2026-40175, stems from a third-party component—Axios HTTP client library—and enables attackers to execute malicious code remotely. This article explores the technical details, impact, and mitigation steps for this high-severity threat.
### Key Points
- Vulnerability: CVE-2026-40175 enables remote code execution (RCE) via prototype pollution in the Axios library.
- Affected Versions: Siemens gWAP versions below 3.1.1 are vulnerable.
- Severity: Rated 8.0 (High) on the CVSS scale, with potential for full system compromise.
- Impact: Critical manufacturing sectors worldwide are at risk, particularly those relying on Siemens gWAP for industrial operations.
- Solution: Siemens has released gWAP version 3.1.1 to patch the flaw. Users must update immediately.
### Technical Details
#### Root Cause
The vulnerability originates from a "Gadget" attack chain in the Axios HTTP client library, a popular tool for making HTTP requests in JavaScript environments. Prior to versions 1.15.0 and 0.3.1, Axios was susceptible to prototype pollution, a flaw that allows attackers to manipulate JavaScript object prototypes. This can be escalated to RCE or even full cloud compromise (e.g., via AWS IMDSv2 bypass) if combined with other exploits.
#### Exploitation Mechanism
1. Prototype Pollution: Attackers inject malicious properties into JavaScript objects, altering their behavior.
2. HTTP Request Manipulation: The polluted objects are used to craft malicious HTTP requests, exploiting improper neutralization of CRLF sequences in HTTP headers.
3. Remote Code Execution: Successful exploitation allows attackers to execute arbitrary code on the target system, potentially gaining full control.
#### Affected Systems
- Siemens gWAP (all versions below 3.1.1).
- Systems deployed in critical manufacturing sectors worldwide, particularly in environments where gWAP is used for web-based industrial applications.
### Impact Assessment
#### Potential Consequences
- System Compromise: Attackers can gain unauthorized access to industrial systems, leading to data theft, sabotage, or operational disruption.
- Supply Chain Risks: As a third-party component, Axios is widely used, increasing the risk of supply chain attacks across multiple industries.
- Cloud Environments: If deployed in cloud-based industrial systems, the flaw could enable AWS IMDSv2 bypass, leading to full cloud account takeover.
#### Targeted Sectors
- Critical Manufacturing: Siemens gWAP is extensively used in manufacturing environments, making this vulnerability particularly dangerous for industrial operations.
- Global Reach: Deployed worldwide, the flaw poses a risk to organizations across North America, Europe, and Asia.
### Mitigation Steps
#### Immediate Actions
1. Update gWAP: Siemens has released version 3.1.1 to patch the vulnerability. Users must upgrade immediately to secure their systems.
- Download the update: Siemens Support Portal
2. Isolate Vulnerable Systems: Restrict network access to gWAP instances until they are updated.
3. Monitor for Exploitation: Deploy intrusion detection systems (IDS) to identify signs of compromise.
#### Long-Term Recommendations
- Network Segmentation: Isolate industrial control systems (ICS) from business networks using firewalls and VLANs.
- Secure Remote Access: Use Virtual Private Networks (VPNs) for remote access, ensuring they are updated to the latest version.
- Follow Siemens Guidelines: Adhere to Siemens’ Operational Guidelines for Industrial Security to harden ICS environments.
- Regular Audits: Conduct periodic security audits to identify and remediate vulnerabilities in third-party components.
## Conclusion
The CVE-2026-40175 vulnerability in Siemens gWAP highlights the growing risks posed by third-party components in industrial systems. With a CVSS score of 8.0, this flaw enables remote code execution, putting critical manufacturing sectors at risk. Organizations must act swiftly to update to gWAP version 3.1.1 and implement robust security measures to prevent exploitation.
As cyber threats to industrial environments evolve, proactive defense strategies—such as network segmentation, regular patching, and vulnerability monitoring—are essential to safeguarding critical infrastructure.
## References
[^1]: Siemens ProductCERT. "SSA-876049: Vulnerability in gWAP". Retrieved 2024-10-02.
[^2]: CISA. "ICSA-26-134-01: Siemens gWAP Vulnerability". Retrieved 2024-10-02.
[^3]: MITRE. "CVE-2026-40175 Detail". Retrieved 2024-10-02.
[^4]: Axios GitHub. "Security Advisory: Prototype Pollution in Axios". Retrieved 2024-10-02.