Unauthorized Access Vulnerability in AppEngine Fileaccess by SICK
CVE-2026-2331

9.8CRITICAL

Key Information:

Vendor

Sick Ag

Status
Sick Lector85x
Sick Lector83x
Vendor
CVE Published:
6 March 2026

What is CVE-2026-2331?

The vulnerability in SICK's AppEngine Fileaccess allows attackers to execute unauthenticated read and write operations on sensitive filesystem directories. This exposure, caused by improper access restrictions, permits unauthorized access to critical directories via HTTP, including device parameter files that contain application settings and customer-defined passwords. Furthermore, it allows access to the custom application directory, potentially enabling execution of arbitrary Lua code within the AppEngine’s sandboxed environment. Immediate remediation is advised to protect against unauthorized access and to safeguard sensitive application information.

Affected Version(s)

SICK Lector83x 2.6.0 <= 2.7.0

SICK Lector85x 2.6.0 <= 2.7.0

References

https://www.sick.com/psirt
x_SICK PSIRT Security Advisories
https://www.sick.com/media/docs/9/19/719/special_informat...
x_SICK Operating Guidelines
https://www.cisa.gov/resources-tools/resources/ics-recomm...
x_ICS-CERT recommended practices on Industrial Security

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.