Description
An unauthenticated remote attacker is able to exhaust all available TCP connections in the CODESYS EtherNet/IP adapter stack, preventing legitimate clients from establishing new connections.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
https://codesys.csaf-tp.certvde.com/.well-known/csaf/white/2026/advisory2026-04_vde-2026-040.json
Vendor Advisory vendor-advisory
https://www.certvde.com/en/advisories/VDE-2026-040/
Scores
CVSS v4
8.7
EPSS
0.0042
EPSS Percentile
33.4%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-754
Status
published
Products (1)
CODESYS/CODESYS EtherNetIP
1.0.0.0 - 4.9.0.0
Published
Apr 23, 2026
Tracked Since
Apr 23, 2026