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CVE-2026-2331

Quick assessment

Affected
SICK AG SICK Lector85x
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SICK Lector85x和SICK SICK Lector83x都是德国SICK公司的一系列二维码图像识别读码器。 SICK Lector85x和SICK SICK Lector83x存在安全漏洞，该漏洞源于不正确的访问限制，攻击者可能会通过HTTP上的AppEngine Fileaccess对敏感的文件系统区域执行未经身份验证的读写操作。

CVSS 9.8 · Critical EPSS 0.90% · P58
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I. Basic Information for CVE-2026-2331

Vulnerability Information
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Vulnerability Title
CVE-2026-2331
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对外部实体的文件或目录可访问
Source: CVE Program / CVE List V5
Vulnerability Title
SICK Lector85x和SICK SICK Lector83x 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SICK Lector85x和SICK SICK Lector83x都是德国SICK公司的一系列二维码图像识别读码器。 SICK Lector85x和SICK SICK Lector83x存在安全漏洞，该漏洞源于不正确的访问限制，攻击者可能会通过HTTP上的AppEngine Fileaccess对敏感的文件系统区域执行未经身份验证的读写操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
SICK AG SICK Lector85x 2.6.0 ~ 2.7.0 -
SICK AG SICK Lector83x 2.6.0 ~ 2.7.0 -

II. Public POCs for CVE-2026-2331

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III. Intelligence Information for CVE-2026-2331

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Vendor Advisories for CVE-2026-2331 (1)

IV. Related Vulnerabilities

Same product: SICK Lector85x
Same vendor: SICK AG
Same weakness: CWE-552

V. Comments for CVE-2026-2331

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