An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication channel to be closed.
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://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17091&token=c450f8bbbd838c647d102f359356386c6ea5aeca&download=
Source: Mitre, NVD
Published: 2022-04-07
Updated: 2026-06-17
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
EPSS: 0.00727