Risk Scores
CVSS v3.1
6.300000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| ICS-CERT | Siemens SINEC NMS |
Timeline
- Apr 21, 2026 CVE Published
=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3995 ICS Advisory | ICSA-26-111-03 Siemens SINEC NMS 22 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Siemens SINEC NMS Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2026-24032 Original Bulletin: https://www.cisa.gov/news-events/ics-advisories/icsa-26-111-03 Comment: CVSS (Max): 6.3 CVE-2026-24032 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L) CVSS Source: ICS-CERT Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L EPSS (Max): 0.0% (14th) CVE-2026-24032 2026-04-21 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-26-111-03) Siemens SINEC NMS Release Date April 21, 2026 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Siemens SINEC NMS when used with User Management Component (UMC) contains an authentication bypass vulnerability due to insufficient validation of user identity. This could allow an unauthenticated remote attacker to bypass authentication and gain unauthorized access to the application. Siemens has released a new version for SINEC NMS and recommends to update to the latest version. The following versions of Siemens SINEC NMS are affected: o SINEC NMS CVSS Vendor Equipment Vulnerabilities v3 7.3 Siemens Siemens SINEC Improper Verification of Cryptographic NMS Signature Background o Critical Infrastructure Sectors: Critical Manufacturing o Countries/Areas Deployed: Worldwide o Company Headquarters Location: Germany --------------------------------------------------------------------------------- Vulnerabilities Expand All + CVE-2026-24032 The affected application contains an authentication weakness due to insufficient validation of user identity in the UMC component. This could allow an unauthenticated remote attacker to bypass authentication and gain unauthorized access to the application. (ZDI-CAN-27564) View CVE Details --------------------------------------------------------------------------------- Affected Products Siemens SINEC NMS Vendor: Siemens Product Version: SINEC NMS Product Status: known_affected Remediations Vendor fix Update to V4.0 SP3 or later version https://support.industry.siemens.com/cs/ww/en/view/110000760/ Relevant CWE: CWE-347 Improper Verification of Cryptographic Signature --------------------------------------------------------------------------------- Metrics CVSS Version Base Score Base Vector String Severity 3.1 7.3 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/ A:L --------------------------------------------------------------------------------- Acknowledgments o Siemens ProductCERT reported this vulnerability to CISA. --------------------------------------------------------------------------------- General Recommendations As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/ industrialsecurity --------------------------------------------------------------------------------- Additional Resources For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert /advisories --------------------------------------------------------------------------------- Terms of Use The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use. --------------------------------------------------------------------------------- Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/ notification) and this Privacy & Use policy (https://www.cisa.gov/ privacy-policy). --------------------------------------------------------------------------------- Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolate them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. --------------------------------------------------------------------------------- Advisory Conversion Disclaimer This ICSA is a verbatim republication of Siemens ProductCERT SSA-801704 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact Siemens ProductCERT directly for any questions regarding this advisory. Revision History o Initial Release Date: 2026-04-14 Date Revision Summary 2026-04-14 1 Publication Date 2026-04-21 2 Initial CISA Republication of Siemens ProductCERT SSA-801704 advisory --------------------------------------------------------------------------------- Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Vendor o Siemens - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================
| Vendor | Product | Versions |
|---|---|---|
| ICS-CERT | Siemens SINEC NMS |