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CVE-2021-34596

MEDIUMCVSS 6.5/10EPSS 0.83%

Last modified

CVE-2021-34596 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.83%

52.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Wago750-823 Firmware< fw10
Wago750-829 Firmware< fw17
Wago750-831 Firmware< fw17
Wago750-832 Firmware< fw10
Wago750-852 Firmware< fw17
Wago750-862 Firmware< fw10
Wago750-880 Firmware< fw17
Wago750-881 Firmware< fw17
Wago750-882 Firmware< fw17
Wago750-885 Firmware< fw17
Wago750-889 Firmware< fw17
Wago750-890 Firmware< fw10
Wago750-891 Firmware< fw10
Wago750-893 Firmware< fw10
Wago750-8202 Firmware< fw20
Wago750-8203 Firmware< fw20
Wago750-8204 Firmware< fw20
Wago750-8206 Firmware< fw20
Wago750-8207 Firmware< fw20
Wago750-8208 Firmware< fw20
Wago750-8210 Firmware< fw20
Wago750-8211 Firmware< fw20
Wago750-8212 Firmware< fw20
Wago750-8213 Firmware< fw20
Wago750-8214 Firmware< fw20
Wago750-8216 Firmware< fw20
Wago750-8217 Firmware< fw20
CodesysCodesys< 1.1.9.22
CodesysPlcwinnt< 2.4.7.56
CodesysRuntime Toolkit< 2.4.7.56

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is 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.
How severe is CVE-2021-34596?
CVE-2021-34596 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34596?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34596?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST