CVE-2018-8836

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take...

5.3 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

3.71%Up 2.9 points since Apr 14, 2021

What each source reports

NVD Score used 5.3

Record: CVE-2018-8836
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-404
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-8836
Weakness: CWE-404
Updated: 2026-11-02

EUVDEUVD-2018-20444 No score

Record: EUVD-2018-20444
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pm5g-66xr-995q 5.3

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take...

Record: GHSA-pm5g-66xr-995q
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-404
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-8836 is a medium vulnerability (CVSS 5.3) in Wago 750 Series, published April 3, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.71%, the 89th percentile. No source names a fixed version.