CVE-2021-34566 CRITICAL

CVE-2021-34566: WAGO I/O-Check Service prone to Memory Overflow

Vendor Wago
Product 750-81xx/xxx-xxxFW
Weakness CWE-120
Published November 9, 2022
Last update May 1, 2025
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 9, 2022 CVE published
May 1, 2025 Record updated