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CVE-2021-34566

CRITICALCVSS 9.1/10EPSS 1.04%

Last modified

CVE-2021-34566 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash the iocheck process and write memory resulting in loss of integrity and DoS.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash the iocheck process and write memory resulting in loss of integrity and DoS.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
1.04%

59.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Wago750-8100 Firmware< 18
Wago750-8100 Firmware18
Wago750-8101 Firmware< 18
Wago750-8101 Firmware18
Wago750-8101\/025-000 Firmware< 18
Wago750-8101\/025-000 Firmware18
Wago750-8102 Firmware< 18
Wago750-8102 Firmware18
Wago750-8102\/025-000 Firmware< 18
Wago750-8102\/025-000 Firmware18
Wago750-8202 Firmware< 18
Wago750-8202 Firmware18
Wago750-8202\/000-011 Firmware< 18
Wago750-8202\/000-011 Firmware18
Wago750-8202\/000-012 Firmware< 18
Wago750-8202\/000-012 Firmware18
Wago750-8202\/000-022 Firmware< 18
Wago750-8202\/000-022 Firmware18
Wago750-8202\/025-000 Firmware< 18
Wago750-8202\/025-000 Firmware18
Wago750-8202\/025-001 Firmware< 18
Wago750-8202\/025-001 Firmware18
Wago750-8202\/025-002 Firmware< 18
Wago750-8202\/025-002 Firmware18
Wago750-8202\/040-000 Firmware< 18
Wago750-8202\/040-000 Firmware18
Wago750-8202\/040-001 Firmware< 18
Wago750-8202\/040-001 Firmware18
Wago752-8303\/8000-002 Firmware< 18
Wago752-8303\/8000-002 Firmware18
Wago762-4101 Firmware< 18
Wago762-4101 Firmware18
Wago762-4102 Firmware< 18
Wago762-4102 Firmware18
Wago762-4103 Firmware< 18
Wago762-4103 Firmware18
Wago762-4104 Firmware< 18
Wago762-4104 Firmware18
Wago762-4201\/8000-001 Firmware< 18
Wago762-4201\/8000-001 Firmware18
Wago762-4202\/8000-001 Firmware< 18
Wago762-4202\/8000-001 Firmware18
Wago762-4203\/8000-001 Firmware< 18
Wago762-4203\/8000-001 Firmware18
Wago762-4204\/8000-001 Firmware< 18
Wago762-4204\/8000-001 Firmware18
Wago762-4205\/8000-001 Firmware< 18
Wago762-4205\/8000-001 Firmware18
Wago762-4205\/8000-002 Firmware< 18
Wago762-4205\/8000-002 Firmware18

Showing 50 of 98 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-34566?
In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash the iocheck process and write memory resulting in loss of integrity and DoS.
How severe is CVE-2021-34566?
CVE-2021-34566 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34566?
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-2021-34566?

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

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Source: NVD / NIST