CVE-2026-2331 CVE-2026-2331
Unauthenticated attackers can read and modify sensitive files and execute arbitrary Lua code via exposed HTTP file access on SICK scanners.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2331?
CVE-2026-2331 is a critical missing authorization vulnerability in SICK Lector83x, published on 6 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-552
Which versions are affected by CVE-2026-2331?
How do I fix CVE-2026-2331?
No fix has been published for CVE-2026-2331 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-2331 being exploited?
There is no known exploitation of CVE-2026-2331 in the wild and no public exploit code.
Sources
Also known as GHSA-cvvv-49vh-384q.