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MEDIUM · 6.5

CVE-2021-34596

A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.

Vulnerability Description

A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
Wago750-823 Firmware< fw10
Wago750-823-
Wago750-829 Firmware< fw17
Wago750-829-
Wago750-831 Firmware< fw17
Wago750-831-
Wago750-832 Firmware< fw10
Wago750-832-
Wago750-852 Firmware< fw17
Wago750-852-
Wago750-862 Firmware< fw10
Wago750-862-
Wago750-880 Firmware< fw17
Wago750-880-
Wago750-881 Firmware< fw17
Wago750-881-
Wago750-882 Firmware< fw17
Wago750-882-
Wago750-885 Firmware< fw17
Wago750-885-

Related Weaknesses (CWE)

CWE-824

References

FAQ

What is CVE-2021-34596?

CVE-2021-34596 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.

How severe is CVE-2021-34596?

CVE-2021-34596 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34596?

Check the references section above for vendor advisories and patch information. Affected products include: Wago 750-823 Firmware, Wago 750-823, Wago 750-829 Firmware, Wago 750-829, Wago 750-831 Firmware.