Vulnerability Monitor

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CVE-2021-21000


On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and limited availability for affected systems. Impacting 54 products from wago, from wago, from wago and 51 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-05-24T11:15:07.917

Last Modified

2025-08-15T20:21:18.653

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-770
  • Type: Primary
    CWE-770

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System wago 750-823_firmware < fw08 Yes
Hardware wago 750-823 - No
Operating System wago 750-829_firmware < fw15 Yes
Hardware wago 750-829 - No
Operating System wago 750-831_firmware < fw15 Yes
Hardware wago 750-831 - No
Operating System wago 750-832_firmware < fw08 Yes
Hardware wago 750-832 - No
Operating System wago 750-852_firmware < fw15 Yes
Hardware wago 750-852 - No
Operating System wago 750-862_firmware < fw08 Yes
Hardware wago 750-862 - No
Operating System wago 750-880_firmware < fw16 Yes
Hardware wago 750-880 - No
Operating System wago 750-881_firmware < fw15 Yes
Hardware wago 750-881 - No
Operating System wago 750-882_firmware < fw15 Yes
Hardware wago 750-882 - No
Operating System wago 750-885_firmware < fw15 Yes
Hardware wago 750-885 - No
Operating System wago 750-889_firmware < fw15 Yes
Hardware wago 750-889 - No
Operating System wago 750-890_firmware < fw08 Yes
Hardware wago 750-890 - No
Operating System wago 750-891_firmware < fw08 Yes
Hardware wago 750-891 - No
Operating System wago 750-893_firmware < fw08 Yes
Hardware wago 750-893 - No
Operating System wago 750-8202_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8202 - No
Operating System wago 750-8203_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8203 - No
Operating System wago 750-8204_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8204 - No
Operating System wago 750-8206_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8206 - No
Operating System wago 750-8207_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8207 - No
Operating System wago 750-8208_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8208 - No
Operating System wago 750-8210_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8210 - No
Operating System wago 750-8211_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8211 - No
Operating System wago 750-8212_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8212 - No
Operating System wago 750-8213_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8213 - No
Operating System wago 750-8214_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8214 - No
Operating System wago 750-8216_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8216 - No
Operating System wago 750-8217_firmware < 03.06.19_\(18\) Yes
Hardware wago 750-8217 - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For wago's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.