Vulnerability in Sick Ag Icr890-4
CVE-2026-11841
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.
EPSS: 0.005 (40.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Sick Ag Icr890-4
- Sick Ag Inspectorp61x — versions 0
- Sick Ag Inspectorp62x — versions 0
- Sick Ag Inspectorp63x — versions all versions
- Sick Ag Inspectorp64x — versions all versions
- Sick Ag Inspectorp65x — versions all versions
Weakness classification (CWE)
References
- psirt@sick.de (x_ICS-CERT recommended practices on Industrial Security)
- psirt@sick.de (x_CVSS v3.1 Calculator)
- psirt@sick.de (x_The canonical URL.)
- psirt@sick.de (vendor-advisory)
- psirt@sick.de (x_SICK Operating Guidelines)
- psirt@sick.de (x_SICK PSIRT Security Advisories)
Frequently asked questions
- What is CVE-2026-11841?
- CVE-2026-11841 is a critical-severity vulnerability in Sick Ag Icr890-4, classified under Files or Directories Accessible to External Parties. CVSS score: 9.4/10. Published 2026-07-28.
- How severe is CVE-2026-11841?
- Critical severity. CVSS v3 base score is 9.4 out of 10.