Full Report
Industrial Edge Management contains an authorization bypass vulnerability that could be exploited by an unauthenticated remote attacker to circumvent authentication and to access connected Industrial Edge Devices through the remote connection feature. Siemens has released new versions for the affected products and recommends to update to the latest versions.
Analysis Summary
# Vulnerability: Authorization Bypass in Siemens Industrial Edge Management
## CVE Details
- **CVE ID:** CVE-2026-33892
- **CVSS Score:**
- CVSS v3.1: **7.1 (High)**
- CVSS v4.0: **5.1 (Medium)**
- **CWE:** CWE-305 (Authentication Bypass by Primary Weakness)
## Affected Systems
- **Products:**
- Industrial Edge Management (IEM) Pro
- Industrial Edge Management (IEM) Virtual
- **Versions:**
- All versions >= V1.7.6
- All versions >= V2.0.0
- All versions < V2.8.0
- **Configurations:** The vulnerability is applicable only when the **remote connection feature** is enabled for the Industrial Edge Device.
## Vulnerability Description
Affected management systems fail to properly enforce user authentication for remote connections to managed devices. Due to this flaw, an unauthenticated remote attacker can bypass authentication mechanisms and impersonate a legitimate user.
To successfully exploit the flaw, an attacker must identify the specific header and port used for remote device connections. Once identified, the attacker can establish a tunnel to the connected Industrial Edge Device. Note that while the management layer's authentication is bypassed, any security features residing directly on the device or within specific apps (e.g., app-specific logins) remain intact.
## Exploitation
- **Status:** Not exploited (No reports of exploitation in the wild or public PoC provided in the advisory).
- **Complexity:** Low (Requires identification of specific headers/ports).
- **Attack Vector:** Network
## Impact
- **Confidentiality:** Low (Access to device tunnels).
- **Integrity:** Low (Ability to interact with device management interfaces).
- **Availability:** Low (Potential for unauthorized configuration changes).
## Remediation
### Patches
Siemens recommends updating affected products to the following versions:
- **Industrial Edge Management Pro/Virtual:** Update to **V2.8.0** or later.
- Software can be obtained via the Siemens Industrial Edge Hub: hxxps[://]iehub[.]eu1[.]edge[.]siemens[.]cloud/
### Workarounds
- **Network Segmentation:** Ensure that network access to IEM and connected products is restricted to trusted parties and authorized internal networks only.
- **Feature Disablement:** Disable the "remote connection" feature for devices where it is not strictly required.
- **Adhere to Guidelines:** Follow Siemens' operational guidelines for Industrial Security to ensure the environment is hardened.
## Detection
- **Indicators of Compromise:** Monitor network traffic for unusual or unauthorized tunneling activity directed toward Industrial Edge Devices on remote connection ports.
- **Detection Methods:** Review IEM access logs for remote connection sessions that do not correlate with legitimate user activity or authorized timeframes.
## References
- **Vendor Advisory:** hxxps[://]cert-portal[.]siemens[.]com/productcert/pdf/ssa-609469[.]pdf
- **Siemens Industrial Security Guidelines:** hxxps[://]www[.]siemens[.]com/cert/operational-guidelines-industrial-security
- **General Advisories:** hxxps[://]www[.]siemens[.]com/cert/advisories