{"id":"CVE-2026-9621","aliases":["EUVD-2026-69138","GHSA-x222-px97-5m97"],"status":"published","title":"RSLinx Classic® - Multiple Vulnerabilities","description":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover","severity":{"version":"4.0","score":9.2,"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:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00428,"percentile":0.3747,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2026-09-01T13:33:53Z","modified":"2026-09-01T20:50:01Z","products":[{"vendor":"rockwell automation","product":"rslinx classic®"}],"references":[{"url":"https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9621"},{"url":"https://github.com/advisories/GHSA-x222-px97-5m97"}],"sources":{"cve":[{"id":"CVE-2026-9621","title":"RSLinx Classic® - Multiple Vulnerabilities","description":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover","status":"published","published":"2026-09-01T13:33:53.819Z","modified":"2026-09-01T15:46:15.077Z","cvss":[{"version":"4.0","score":9.2,"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:H","level":"critical","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T13:42:37.965383Z"}],"euvd":[{"id":"EUVD-2026-69138","description":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover","status":"published","published":"2026-09-01T13:33:53Z","modified":"2026-09-01T15:46:15Z","cvss":[{"version":"4.0","score":9.2,"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:H","level":"critical"}],"updated_at":"2026-11-02T18:01:17.79788Z"}],"ghsa":[{"id":"GHSA-x222-px97-5m97","title":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from...","description":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover","status":"published","published":"2026-09-01T15:31:13Z","modified":"2026-09-01T15:31:18Z","cvss":[{"version":"4.0","score":9.2,"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:H/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":"critical"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:11:13.213599Z"}],"nvd":[{"id":"CVE-2026-9621","description":"A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover","status":"published","published":"2026-09-01T14:17:49.377Z","modified":"2026-09-01T20:50:01.96Z","cvss":[{"version":"4.0","score":9.2,"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:H/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":"critical","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:43.04945Z"}]}}