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Dark Reading
Leaders in operational technology/Internet of Things (OT/IoT) discovery and remediation partner to deliver best-in-class IoT enterprise security management solution.
CISA advisories
View CSAF Summary Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens recommends to contact customer support to receive patch and update information. The following versions of Siemens RUGGEDCOM APE1808 Devices are affected: RUGGEDCOM APE1808 vers:all/* (CVE-2026-33387, CVE-2026-33388, CVE-2026-33389, CVE-2026-33391, CVE-2026-33920) CVSS Vendor Equipment v3 7.5 Siemens RUGGEDCOM APE1808 4 Vulnerabilities Improper Neutralization of Special Elements Used in a Template Engine, Incorrect Authorization, Lack of Administrator Control over Security, Cross-Site Request Forgery (CSRF) Background Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-33387 A template injection vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter. An authenticated user with the required privileges can define a dashboard containing a malicious payload, or a victim can be socially engineered into importing a malicious dashboard. When the victim views or imports the dashboard, the payload executes in their browser context, allowing the attacker to modify application data or disrupt application availability. Read More 1 Affected Product RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information Additional Metrics Relevant CWE: CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine CVSS Version Base Score Base Severity Vector String 3.1 4.6 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L View CVE Details CVE-2026-33388 An access control vulnerability was discovered in the Credentials Manager functionality due to insufficient validation of user privileges. A remote authenticated user with limited privileges can view a limited subset of the available entries in the Credentials Manager. The actual credential values are not directly visible, but the user can delete entries or edit their properties. An attacker who deletes or edits an entry can disrupt authentication for dependent devices, and one who manipulates an entry's configuration may be able to indirectly obtain the credentials. Read More 2 Affected Products RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information Additional Metrics Relevant CWE: CWE-863 Incorrect Authorization CVSS Version Base Score Base Severity Vector String 3.1 7.4 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L View CVE Details CVE-2026-33389 An improper certificate/host key validation vulnerability was discovered in the Smart Polling functionality, which established encrypted connections to target devices without validating the remote host's identity, and no option was provided to enable it. A man-in-the-middle attacker positioned between a sensor and a polled device can, during a polling session, impersonate the device and intercept the communication, including the credentials used to access it. The captured credentials can then be replayed to authenticate against the device itself or against other devices sharing the same credentials, allowing the attacker to access and tamper with the device's data and to disrupt its operations. Read More 3 Affected Products RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information Additional Metrics Relevant CWE: CWE-671 Lack of Administrator Control over Security CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L View CVE Details CVE-2026-33391 An access control vulnerability was discovered in the Smart Polling configuration functionality due to insufficient validation of user privileges. An authenticated user with limited privileges can remotely bypass the intended access control of the web management interface and modify the Smart Polling discovery configuration. This allows the attacker to disrupt the visibility of assets in the monitored network. Read More 4 Affected Products RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information Additional Metrics Relevant CWE: CWE-863 Incorrect Authorization CVSS Version Base Score Base Severity Vector String 3.1 5.4 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L View CVE Details CVE-2026-33920 A cross-site request forgery vulnerability was discovered in the login functionality (both standard and SAML) due to missing validation of the anti-CSRF token. An attacker with a valid account can trick a victim into unknowingly authenticating with the attacker's credentials. Any operation performed by the victim in this state is attributed to the attacker's account, compromising the integrity of the audit trail. Read More 5 Affected Products RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information RUGGEDCOM APE1808 with Nozomi Guardian/CMC Product Status: known_affected Remediations Vendor fixContact customer support to receive patch and update information Additional Metrics Relevant CWE: CWE-352 Cross-Site Request Forgery (CSRF) CVSS Version Base Score Base Severity Vector String 3.1 3.5 LOW CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N View CVE Details Acknowledgments Siemens ProductCERT reported these vulnerabilities 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. Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating 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 current version available. Also recognize VPN is only as secure as the 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/ics. 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/ics 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-911336 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 Initial Release Date: 2026-10-13 Date Revision Summary 2026-10-13 1 Publication Date 2026-10-22 2 Initial CISA Republication of Siemens ProductCERT SSA-911336 advisory Legal Notice and Terms of Use
The Hacker News
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The Hacker News
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