VULNERABILITY INTELLIGENCE

CVE-2021-36765

CVSS score7.5 HIGH
EPSS probability0.99%
CISA KEVNot currently listed
Published2021-08-04
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

In CODESYS EtherNetIP before 4.1.0.0, specific EtherNet/IP requests may cause a null pointer dereference in the downloaded vulnerable EtherNet/IP stack that is executed by the CODESYS Control runtime system.

Weakness classification

  • CWE-476: NULL Pointer Dereference

Primary references