VULNERABILITY INTELLIGENCE

CVE-2018-8836

CVSS score5.3 MEDIUM

EPSS probability3.71%

CISA KEVNot currently listed

Published2018-04-03

Last modified2026-06-17

CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.

Weakness classification

CWE-404: Improper Resource Shutdown or Release

Primary references

ics-cert@hq.dhs.gov — Third Party Advisory, VDB Entry
ics-cert@hq.dhs.gov — Third Party Advisory, US Government Resource
ics-cert@hq.dhs.gov — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory