CVE-2022-1068: Modbus Tools Modbus Slave Stack-Based Buffer Overflow

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-01 · updated 2026-06-17
Weakness: CWE-121

Description

Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the registration field. This may cause the program to crash when a long character string is used.

Affected products

Modbus Tools Modbus Slave: before 7.4.3 — fixed in 7.4.3

How to fix

Upgrade to a fixed version: Modbus Tools Modbus Slave 7.4.3. Check the vendor advisory for mitigations.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-22-088-04
https://www.cisa.gov/uscert/ics/advisories/icsa-22-088-04

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