{"id":"CVE-2026-76992","title":"The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit","summary":"The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"CODESYS","product":"Development System 3","affected":["development_system_3 >= 3.0.0.0 < 3.5.22.40","Gateway >= 3.0.0.0 < 3.5.22.40","edge_gateway_for_windows >= 3.0.0.0 < 3.5.22.40","hmi_sl >= 3.0.0.0 < 3.5.22.40","opc_da_server_sl >= 3.0.0.0 < 3.5.22.40","PLCHandler >= 3.0.0.0 < 3.5.22.40","runtime_toolkit >= 3.0.0.0 < 3.5.22.40","edge_gateway_for_linux >= 3.15.0.0 < 4.23.0.0"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T11:16:47.283","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76992","references":[{"url":"https://www.certvde.com/en/advisories/VDE-2026-094/","label":"info@cert.vde.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T12:02:58.583Z","slug":"CVE-2026-76992","body":"## Overview\n\nThe CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}