CVE-2021-45773

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-14 · updated 2026-06-17
Weakness: CWE-476

Description

A NULL pointer dereference in CS104_IPAddress_setFromString at src/iec60870/cs104/cs104_slave.c of lib60870 commit 0d5e76e can lead to a segmentation fault or application crash.

Affected products

MZ Automation lib60870: before 2.3.1 — fixed in 2.3.1

How to fix

Upgrade to a fixed version: MZ Automation lib60870 2.3.1. Check the vendor advisory for mitigations.

References

https://github.com/mz-automation/lib60870/issues/100
https://github.com/mz-automation/lib60870/issues/100

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