// For flags

CVE-2021-34586

CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS)

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

En el servidor web de CODESYS V2 versiones anteriores a 1.1.9.22, unas peticiones del servidor web diseñadas pueden causar una desreferencia de puntero Null en el servidor web de CODESYS y puede resultar en una condición de denegación de servicio

*Credits: This vulnerability was discovered by Tenable Research.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-10 CVE Reserved
  • 2021-10-26 CVE Published
  • 2024-07-10 EPSS Updated
  • 2024-09-17 CVE Updated
  • 2024-09-17 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Codesys
Search vendor "Codesys"
 Codesys
Search vendor "Codesys" for product "Codesys"
 < 1.1.9.22
Search vendor "Codesys" for product "Codesys" and version " < 1.1.9.22"
-
Affected