# CVE-2026-2331

## Summary

- **CVE ID:** CVE-2026-2331
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-552
- **Published:** Mar 6, 2026
- **Last Modified:** Mar 16, 2026

## 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 — SICK Lector85x (2.6.0)
- SICK AG — SICK Lector83x (2.6.0)

## References

- [CNA](https://www.sick.com/psirt)
- [CNA](https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf)
- [CNA](https://www.cisa.gov/resources-tools/resources/ics-recommended-practices)
- [CNA](https://www.first.org/cvss/calculator/3.1)
- [CNA](https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.json)
- [CNA](https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.89%
- **EPSS Percentile:** 57.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._