CVE-2021-34569 CRITICAL

CVE-2021-34569: WAGO I/O-Check Service prone to Out-of-bounds Write

Vendor Wago
Product 750-81xx/xxx-xxxFW
Weakness CWE-787
Published November 9, 2022
Last update May 1, 2025
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

In WAGO I/O-Check Service in multiple products an attacker can send a specially crafted packet containing OS commands to crash the diagnostic tool and write memory.

Key dates

02Disclosure timeline

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