9.8
CRITICAL
CVE-2021-34578
WAGO PLC Unauthorized Settings-Parameter Access Vulnerability
Description

This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.

INFO

Published Date :

Aug. 31, 2021, 11:15 a.m.

Last Modified :

Nov. 21, 2024, 6:10 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-34578 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Wago 750-891_firmware
2 Wago 750-362_firmware
3 Wago 750-363_firmware
4 Wago 750-823_firmware
5 Wago 750-832_firmware
6 Wago 750-832\/000-002_firmware
7 Wago 750-862_firmware
8 Wago 750-890\/025-000_firmware
9 Wago 750-890\/025-001_firmware
10 Wago 750-890\/025-002_firmware
11 Wago 750-890\/040-000_firmware
12 Wago 750-893_firmware
13 Wago 750-891
14 Wago 750-362
15 Wago 750-363
16 Wago 750-823
17 Wago 750-832
18 Wago 750-832\/000-002
19 Wago 750-862
20 Wago 750-890\/025-000
21 Wago 750-890\/025-001
22 Wago 750-890\/025-002
23 Wago 750-890\/040-000
24 Wago 750-893
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-34578.

URL Resource
https://cert.vde.com/en-us/advisories/vde-2020-044 Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2020-044 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-34578 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-34578 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://cert.vde.com/en-us/advisories/vde-2020-044
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Sep. 08, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://cert.vde.com/en-us/advisories/vde-2020-044 No Types Assigned https://cert.vde.com/en-us/advisories/vde-2020-044 Third Party Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-890\/040-000_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-890\/040-000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-890\/025-001_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-890\/025-001:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-890\/025-002_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-890\/025-002:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-890\/025-000_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-890\/025-000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-832\/000-002_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-832\/000-002:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-362_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-362:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-823:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-832:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-363_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-363:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-862:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-891:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:* versions up to (including) fw07 OR cpe:2.3:h:wago:750-893:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-34578 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.30 }} -0.01%

score

0.69047

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability