---
title: "Critical Authorization Bypass Flaw in Siemens Industrial Edge Devices (CVE-2025-40805)"
short_title: "Siemens Industrial Edge auth bypass flaw"
description: "Siemens warns of a critical authorization bypass vulnerability (CVE-2025-40805) in Industrial Edge Device Kit. Update now to prevent unauthenticated remote attacks."
author: "Vitus"
date: 2025-01-24
categories: [Cybersecurity, Vulnerabilities]
tags: [siemens, cve-2025-40805, industrial-security, authentication-bypass, critical-vulnerability]
score: 0.92
cve_ids: [CVE-2025-40805]
---
TL;DR
Siemens has disclosed a critical authorization bypass vulnerability (CVE-2025-40805) in its Industrial Edge Device Kit, allowing unauthenticated remote attackers to impersonate legitimate users. The flaw affects multiple versions of the kit, and Siemens has released patches for some products while recommending countermeasures for others. Immediate action is required to mitigate risks to critical manufacturing infrastructure.
---
Main Content
Introduction
Siemens has issued an urgent security advisory warning users of its Industrial Edge Device Kit about a severe authorization bypass vulnerability. Tracked as CVE-2025-40805, the flaw could enable unauthenticated remote attackers to circumvent authentication mechanisms and gain unauthorized access to sensitive systems. With a CVSS score of 10.0 (Critical), this vulnerability poses a significant risk to industrial environments, particularly in critical manufacturing sectors.
---
Key Points
- Vulnerability ID: CVE-2025-40805 (CVSS 10.0, Critical)
- Affected Products: Siemens Industrial Edge Device Kit (arm64 and x86-64 architectures, versions V1.5 to V1.25)
- Attack Vector: Unauthenticated remote attackers can bypass authentication on specific API endpoints.
- Impact: Attackers can impersonate legitimate users, potentially gaining control over industrial systems.
- Mitigation: Siemens has released patches for the latest versions and recommends network segmentation and access restrictions for unpatched systems.
---
Technical Details
The vulnerability stems from improper enforcement of user authentication on specific API endpoints in the Siemens Industrial Edge Device Kit. An attacker who successfully exploits this flaw can bypass authentication entirely, provided they have knowledge of a legitimate user's identity. This could lead to unauthorized access, data manipulation, or disruption of industrial operations.
#### Affected Versions
The following versions of the Siemens Industrial Edge Device Kit are affected by CVE-2025-40805:
- arm64: V1.5 to V1.25
- x86-64: V1.5 to V1.25
---
Impact Assessment
The vulnerability is classified as Critical due to its potential to disrupt critical manufacturing processes. Successful exploitation could result in:
- Unauthorized access to industrial control systems (ICS).
- Manipulation or theft of sensitive operational data.
- Disruption of manufacturing processes, leading to financial and operational losses.
- Compromise of broader industrial networks if the device is used as an entry point.
Given the worldwide deployment of Siemens Industrial Edge devices, the flaw poses a significant risk to organizations relying on these systems for operational efficiency and security.
---
Mitigation Steps
Siemens has released patches for the following versions:
- Industrial Edge Device Kit - arm64 V1.24: Update to V1.24.2 or later.
- Industrial Edge Device Kit - x86-64 V1.24: Update to V1.24.2 or later.
- Industrial Edge Device Kit - arm64 V1.25: Update to V1.25.1 or later.
- Industrial Edge Device Kit - x86-64 V1.25: Update to V1.25.1 or later.
For products where patches are not yet available, Siemens recommends:
- Restricting network access to affected devices to trusted parties only.
- Implementing network segmentation to isolate industrial control systems from business networks.
- Monitoring for suspicious activity and enforcing strict access controls.
---
Attack Vector
The vulnerability can be exploited remotely without authentication. Attackers must:
1. Identify a legitimate user's identity (e.g., username or token).
2. Send crafted requests to vulnerable API endpoints to bypass authentication.
3. Impersonate the legitimate user to gain unauthorized access.
---
Background
Siemens Industrial Edge devices are widely used in critical manufacturing sectors, enabling organizations to optimize industrial processes through edge computing. These devices are deployed globally, making the vulnerability particularly concerning for industries reliant on Siemens technology.
- Critical Infrastructure Sector: Critical Manufacturing
- Deployment: Worldwide
- Company Headquarters: Germany
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Conclusion
The CVE-2025-40805 vulnerability in Siemens Industrial Edge Device Kit highlights the critical importance of robust authentication mechanisms in industrial environments. Organizations using affected versions must apply patches immediately and implement recommended countermeasures to mitigate risks. Failure to act could expose industrial systems to unauthorized access, operational disruption, and potential safety hazards.
For further guidance, users are advised to consult Siemens' [operational guidelines for Industrial Security](https://www.siemens.com/cert/operational-guidelines-industrial-security) and contact the [Siemens ProductCERT](https://www.siemens.com/cert/advisories) for assistance.
---
References
[^1]: Siemens ProductCERT. "[SSA-014678: Authorization Bypass in Industrial Edge Device Kit](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-09.json)". Retrieved 2025-01-24.
[^2]: CISA. "[ICSA-26-015-09: Siemens Industrial Edge Device Kit](https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-09)". Retrieved 2025-01-24.
[^3]: CVE Details. "[CVE-2025-40805](https://www.cve.org/CVERecord?id=CVE-2025-40805)". Retrieved 2025-01-24.