CVE-2021-34566

CRITICAL

Wago 750-8100 Firmware < 18 - Buffer Overflow

Title source: rule
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 9.1
EPSS 0.0090
EPSS Percentile 75.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-120
Status published
Products (25)
wago/750-8100_firmware 18 (3 CPE variants)
wago/750-8100_firmware < 18
wago/750-8101\/025-000_firmware 18 (3 CPE variants)
wago/750-8101\/025-000_firmware < 18
wago/750-8101_firmware 18 (3 CPE variants)
wago/750-8101_firmware < 18
wago/750-8102\/025-000_firmware 18 (3 CPE variants)
wago/750-8102\/025-000_firmware < 18
wago/750-8102_firmware 18 (3 CPE variants)
wago/750-8102_firmware < 18
... and 15 more
Published Nov 09, 2022
Tracked Since Feb 18, 2026