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CVE-2021-21001— WAGO: PFC200 Access to files outside the home directory

Quick assessment

Affected
WAGO Series PFC200 Controller
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.

WAGO是德国万可（WAGO）的一款750-88x系列可编程逻辑控制器。该设备专门为在工业环境下应用而设计的数字运算操作电子系统。 WAGO PFC200设备存在安全漏洞，该漏洞源于具有特殊数据包的授权攻击者可利用该漏洞可以以更高的权限访问设备的网络访问文件系统。

CVSS 9.1 · Critical EPSS 1.13% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-21001

Vulnerability Information
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Vulnerability Title
WAGO: PFC200 Access to files outside the home directory
Source: CVE Program / CVE List V5
Vulnerability Description
On WAGO PFC200 devices in different firmware versions with special crafted packets an authorised attacker with network access to the device can access the file system with higher privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
WAGO 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAGO是德国万可（WAGO）的一款750-88x系列可编程逻辑控制器。该设备专门为在工业环境下应用而设计的数字运算操作电子系统。 WAGO PFC200设备存在安全漏洞，该漏洞源于具有特殊数据包的授权攻击者可利用该漏洞可以以更高的权限访问设备的网络访问文件系统。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WAGO Series PFC200 Controller 750-823 ~ FW07 -
WAGO Series Ethernet Controller 750-8202/xxx-xxx ~ 03.06.19 (18) -

II. Public POCs for CVE-2021-21001

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III. Intelligence Information for CVE-2021-21001

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Other References for CVE-2021-21001 (1)

IV. Related Vulnerabilities

Same product: Series PFC200 Controller
Same vendor: WAGO
Same weakness: CWE-22

V. Comments for CVE-2021-21001

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