---
title: "Siemens SINEC Security Monitor Flaws Expose Critical Systems to Attacks"
short_title: "Siemens SINEC Security Monitor vulnerabilities patched"
description: "Siemens patches two critical vulnerabilities in SINEC Security Monitor (CVE-2025-40830, CVE-2025-40831) that could enable unauthorized access and DoS attacks. Update now."
author: "Vitus"
date: 2025-01-24
categories: [Cybersecurity, Vulnerabilities]
tags: [siemens, cve-2025-40830, cve-2025-40831, industrial-security, dos]
score: 0.75
cve_ids: [CVE-2025-40830, CVE-2025-40831]
---
TL;DR
Siemens has released a critical update for its SINEC Security Monitor to address two vulnerabilities—CVE-2025-40830 and CVE-2025-40831—that could allow unauthorized file access and denial-of-service (DoS) attacks. Organizations using versions prior to V4.10.0 are urged to update immediately to mitigate risks to critical manufacturing infrastructure.
---
Main Content
Introduction
Siemens has addressed two significant security flaws in its SINEC Security Monitor, a tool designed to monitor and secure industrial networks. The vulnerabilities, CVE-2025-40830 and CVE-2025-40831, could enable authenticated attackers with low privileges to exploit improper authorization and input validation mechanisms. These flaws pose serious risks to critical manufacturing sectors worldwide, emphasizing the need for immediate action.
---
Key Points
- Two critical vulnerabilities identified in Siemens SINEC Security Monitor (versions prior to V4.10.0).
- CVE-2025-40830: Allows unauthorized file read/write access due to improper authorization checks.
- CVE-2025-40831: Enables DoS attacks via improper input validation in report generation.
- Affected sectors: Primarily critical manufacturing, with global deployment.
- Recommended action: Update to V4.10.0 or later immediately.
---
Technical Details
#### CVE-2025-40830: Improper Authorization
- CVSS Score: 6.7 (Medium)
- Vector: `CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`
- Description: The vulnerability stems from inadequate authorization checks in the file_transfer feature of the ssmctl-client command. An authenticated attacker with low privileges could exploit this flaw to read or write to any file on the server or sensor, potentially leading to data breaches or system compromise.
- CWE Reference: [CWE-285: Improper Authorization](https://cwe.mitre.org/data/definitions/285.html)
#### CVE-2025-40831: Improper Input Validation
- CVSS Score: 6.5 (Medium)
- Vector: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`
- Description: This flaw involves the lack of input validation for the date parameter in the report generation functionality. An authenticated attacker with low privileges could exploit this to trigger a denial-of-service (DoS) condition, disrupting the tool’s reporting capabilities.
- CWE Reference: [CWE-20: Improper Input Validation](https://cwe.mitre.org/data/definitions/20.html)
---
Impact Assessment
The vulnerabilities in SINEC Security Monitor pose significant risks to organizations in critical manufacturing sectors, where industrial control systems (ICS) are prevalent. Exploitation of these flaws could lead to:
- Unauthorized access to sensitive files and system resources.
- Disruption of monitoring and reporting functionalities, compromising operational visibility.
- Potential lateral movement within industrial networks, increasing the risk of broader system compromise.
Given the global deployment of Siemens products, these vulnerabilities could impact organizations worldwide, making timely patching essential.
---
Mitigation Steps
Siemens has released SINEC Security Monitor V4.10.0 to address these vulnerabilities. Organizations are advised to:
1. Update immediately to the latest version ([V4.10.0 or later](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-06.json)).
2. Restrict network access to industrial control systems and devices.
3. Isolate control system networks from business networks using firewalls.
4. Use secure remote access methods, such as VPNs, and ensure they are updated to the latest versions.
5. Follow Siemens’ operational guidelines for industrial security ([Download here](https://www.siemens.com/cert/operational-guidelines-industrial-security)).
---
Affected Systems
- Product: Siemens SINEC Security Monitor
- Affected Versions: All versions prior to V4.10.0
- Vendor: Siemens
- Deployment: Worldwide, with a focus on critical manufacturing sectors
---
Conclusion
The discovery of CVE-2025-40830 and CVE-2025-40831 in Siemens SINEC Security Monitor underscores the importance of robust security practices in industrial environments. Organizations must prioritize updating to the latest version to mitigate risks and protect critical infrastructure from potential exploitation. Siemens’ proactive response and recommendations provide a clear path forward, but timely action is crucial to maintaining operational security.
---
References
[^1]: Siemens ProductCERT. "[SSA-882673: SINEC Security Monitor Vulnerabilities](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-06.json)". Retrieved 2025-01-24.
[^2]: CISA. "[ICSA-26-015-06: Siemens SINEC Security Monitor](https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-06)". Retrieved 2025-01-24.
[^3]: MITRE. "[CWE-285: Improper Authorization](https://cwe.mitre.org/data/definitions/285.html)". Retrieved 2025-01-24.
[^4]: MITRE. "[CWE-20: Improper Input Validation](https://cwe.mitre.org/data/definitions/20.html)". Retrieved 2025-01-24.