CVE-2021-29242

high

Description

CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.

References

References
More

https://www.cisa.gov/news-events/ics-advisories/icsa-26-076-01

https://www.cisa.gov/news-events/ics-advisories/icsa-25-273-04

https://www.codesys.com/security/security-reports.html

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14640&token=623b6fceb0579ef0f7505e29beefa5b3f8ac7873&download=

https://customers.codesys.com/index.php

Details

Source: Mitre, NVD

Published: 2021-05-03

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.3

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