Back to Database
Status published
High
CVE-2021-34568
WAGO I/O-Check Service prone to Allocation of Resources Without Limits or Throttling
Vulnerability Description
In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-34568
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- These vulnerabilities were reported to WAGO by Uri Katz of Claroty.
More from WAGO
View All →CVE-2025-41732
Stack-based buffer overflow via unsafe sscanf in check_cookie()
Critical
9.8
CVE-2025-41730
Stack-based buffer overflow via unsafe sscanf in check_account()
Critical
9.8
CVE-2025-41716
Unauthenticated User Enumeration via Missing Authentication
Medium
5.3
CVE-2025-41715
Missing Authentication for Database Access in Web Application
Critical
9.8
CVE-2025-41713
WAGO: Vulnerability in hardware switch circuit
Medium
6.5
Affected Vendor
WAGO
View all reports →Affected Software
750-81xx/xxx-xxxFW, 750-82xx/xxx-xxx, 752-8303/8000-0002, 762-4xxx, 762-5xxx, 762-6xxx
Vulnerable Versions:
FW1
Timeline
Official Publish:
November 9th, 2022
Last Modified:
May 1st, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H