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Fencer Intel
medium 5.3

CVE-2018-8836 json

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 w…

published 8y ago modified 4mo ago also EUVD-2018-20444

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-088-01 updated cvss 5.3

WAGO 750 Series

  • WAGO 750-829 firmware <= 10 WAGO 750-831 firmware <= 10 WAGO 750-852 firmware <= 10 WAGO 750-880 firmware <= 10 WAGO 750-881 firmware <= 10 WAGO 750-882 firmware <= 10
    +2 more products
    WAGO 750-885 firmware <= 10 WAGO 750-889 firmware <= 10
    affected: mitigation “WAGO has released new firmware addressing this vulnerability that can be obtained by contacting WAGO support via email at support@wago.com.” wago.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.71% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • WAGO WAGO 750 Series

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.