Vulnerability Monitor

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CVE-2021-34586

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition.

Published

2021-10-26T10:15:07.957

Last Modified

2025-08-15T20:26:04.430

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

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-476
  • Type: Primary
    CWE-476
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System wago 750-823_firmware < fw10 Yes
Hardware wago 750-823 - No
Operating System wago 750-829_firmware < fw17 Yes
Hardware wago 750-829 - No
Operating System wago 750-831_firmware < fw17 Yes
Hardware wago 750-831 - No
Operating System wago 750-832_firmware < fw10 Yes
Hardware wago 750-832 - No
Operating System wago 750-852_firmware < fw17 Yes
Hardware wago 750-852 - No
Operating System wago 750-862_firmware < fw10 Yes
Hardware wago 750-862 - No
Operating System wago 750-880_firmware < fw17 Yes
Hardware wago 750-880 - No
Operating System wago 750-881_firmware < fw17 Yes
Hardware wago 750-881 - No
Operating System wago 750-882_firmware < fw17 Yes
Hardware wago 750-882 - No
Operating System wago 750-885_firmware < fw17 Yes
Hardware wago 750-885 - No
Operating System wago 750-889_firmware < fw17 Yes
Hardware wago 750-889 - No
Operating System wago 750-890_firmware < fw10 Yes
Hardware wago 750-890 - No
Operating System wago 750-891_firmware < fw10 Yes
Hardware wago 750-891 - No
Operating System wago 750-893_firmware < fw10 Yes
Hardware wago 750-893 - No
Operating System wago 750-8202_firmware < fw20 Yes
Hardware wago 750-8202 - No
Operating System wago 750-8203_firmware < fw20 Yes
Hardware wago 750-8203 - No
Operating System wago 750-8204_firmware < fw20 Yes
Hardware wago 750-8204 - No
Operating System wago 750-8206_firmware < fw20 Yes
Hardware wago 750-8206 - No
Operating System wago 750-8207_firmware < fw20 Yes
Hardware wago 750-8207 - No
Operating System wago 750-8208_firmware < fw20 Yes
Hardware wago 750-8208 - No
Operating System wago 750-8210_firmware < fw20 Yes
Hardware wago 750-8210 - No
Operating System wago 750-8211_firmware < fw20 Yes
Hardware wago 750-8211 - No
Operating System wago 750-8212_firmware < fw20 Yes
Hardware wago 750-8212 - No
Operating System wago 750-8213_firmware < fw20 Yes
Hardware wago 750-8213 - No
Operating System wago 750-8214_firmware < fw20 Yes
Hardware wago 750-8214 - No
Operating System wago 750-8216_firmware < fw20 Yes
Hardware wago 750-8216 - No
Operating System wago 750-8217_firmware < fw20 Yes
Hardware wago 750-8217 - No
Application codesys codesys < 1.1.9.22 Yes
References