{"id":"CVE-2026-76992","aliases":["EUVD-2026-89776","GHSA-cm9r-92x3-hmfj"],"status":"published","title":"Uncontrolled Memory Allocation in CODESYS Gateway Client","description":"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 excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.","severity":{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00327,"percentile":0.26002,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2026-09-30T11:07:45Z","modified":"2026-09-30T19:57:08Z","products":[{"vendor":"codesys","product":"development system 3"},{"vendor":"codesys","product":"edge gateway for linux"},{"vendor":"codesys","product":"edge gateway for windows"},{"vendor":"codesys","product":"gateway"},{"vendor":"codesys","product":"hmi (sl)"},{"vendor":"codesys","product":"opc da server sl"},{"vendor":"codesys","product":"plchandler"},{"vendor":"codesys","product":"runtime toolkit"},{"vendor":"netscaler","product":"gateway"}],"references":[{"url":"https://www.certvde.com/en/advisories/VDE-2026-094/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76992"},{"url":"https://www.certvde.com/en/advisories/VDE-2026-094"},{"url":"https://github.com/advisories/GHSA-cm9r-92x3-hmfj"}],"sources":{"cve":[{"id":"CVE-2026-76992","title":"Uncontrolled Memory Allocation in CODESYS Gateway Client","description":"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 excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.","status":"published","published":"2026-09-30T11:07:45.751Z","modified":"2026-09-30T15:28:07.834Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:46:21.568011Z"}],"euvd":[{"id":"EUVD-2026-89776","description":"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 excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.","status":"published","published":"2026-09-30T11:07:45Z","modified":"2026-09-30T15:28:07Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-02T17:27:49.016334Z"}],"ghsa":[{"id":"GHSA-cm9r-92x3-hmfj","title":"The CODESYS Gateway Client allocates memory based on a size field in a gateway response without...","description":"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 excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.","status":"published","published":"2026-09-30T12:35:17Z","modified":"2026-09-30T12:35:21Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-76992","description":"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 excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.","status":"published","published":"2026-09-30T11:16:47.283Z","modified":"2026-09-30T19:57:08.043Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:52.759595Z"}]}}