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CVE-2026-11841: CVE-2026-11841

• Severity: critical (CVSS 9.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-28 · updated 2026-09-09
• Weakness: CWE-552

Description

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 access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.

Affected products

• SICK AG ICR890-4: before 2.15.0 — fixed in 2.15.0
• SICK AG InspectorP61x: before 5.4.0 — fixed in 5.4.0
• SICK AG InspectorP62x: before 5.4.0 — fixed in 5.4.0
• SICK AG InspectorP63x: all versions
• SICK AG InspectorP64x: all versions
• SICK AG InspectorP65x: all versions

How to fix

Upgrade to a fixed version: SICK AG ICR890-4 2.15.0; SICK AG InspectorP61x 5.4.0; SICK AG InspectorP62x 5.4.0. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
• https://www.first.org/cvss/calculator/3.1
• https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0010.json
• https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0010.pdf
• https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
• https://www.sick.com/psirt

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