{"id":"CVE-2021-21777","details":"An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read.","modified":"2026-08-07T15:14:04.414385Z","published":"2021-06-17T11:15:07.707Z","references":[{"type":"EVIDENCE","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eipstackgroup/opener","events":[{"introduced":"150146e3058a493d5accf6d5f76ff450468d7bd7"},{"last_affected":"150146e3058a493d5accf6d5f76ff450468d7bd7"}],"database_specific":{"cpe":"cpe:2.3:a:opener_project:opener:2.3:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.3"},{"last_affected":"2.3"}],"source":"CPE_STRING"}}],"versions":["2.3","v2.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21777.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H"}]}