Summary
Two vulnerabilities affecting the SICK Lector85x and SICK Lector83x product families have been identified. Both vulnerabilities are caused by insufficient access restrictions in HTTP-based interfaces, which may allow unauthenticated access to sensitive device resources. Depending on the configuration, this could lead to unauthorized modification of device settings and security-relevant data. SICK recommends applying the defined remediations for both vulnerabilities. SICK is currently not aware of any public exploits.
Vulnerabilities 2
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Critical 9.8
CVE-2026-2331
An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file…
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Critical 9.4
CVE-2026-2330
An attacker may access restricted filesystem areas on the device via the CROWN REST interface due to incomplete whitelist enforcement. Certain directories intended for internal testing were not covered by the whitelist and are accessible without authenticatio…
Revision history
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#1
Initial version
References
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SICK PSIRT Security Advisories
https://www.sick.com/psirt
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SICK Operating Guidelines
https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
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ICS-CERT recommended practices on Industrial Security
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
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CVSS v3.1 Calculator
https://www.first.org/cvss/calculator/3.1