{"id":"CVE-2026-8805","aliases":["EUVD-2026-37973","GHSA-hc5r-cmjq-47w9"],"status":"published","title":"Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module","description":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.","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":"2026-11-10","score":0.00637,"percentile":0.50889,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2026-06-19T02:26:57Z","modified":"2026-10-26T11:10:00Z","products":[{"vendor":"mitsubishi electric corporation","product":"mitsubishi electric melsec iq-f series fx5-eip ethernet/ip module fx5-eip"}],"references":[{"url":"https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-002_en.pdf","tags":["vendor-advisory"]},{"url":"https://jvn.jp/vu/JVNVU97140216/","tags":["government-resource"]},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-05","tags":["government-resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8805"},{"url":"https://jvn.jp/vu/JVNVU97140216"},{"url":"https://github.com/advisories/GHSA-hc5r-cmjq-47w9"}],"sources":{"cve":[{"id":"CVE-2026-8805","title":"Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module","description":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.","status":"published","published":"2026-06-19T02:26:57.176Z","modified":"2026-06-22T14:50:21.057Z","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"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T13:48:02.226896Z"}],"euvd":[{"id":"EUVD-2026-37973","description":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.","status":"published","published":"2026-06-19T02:26:57Z","modified":"2026-06-22T14:50:21Z","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","level":"high"}],"updated_at":"2026-11-02T18:20:34.745289Z"}],"ghsa":[{"id":"GHSA-hc5r-cmjq-47w9","title":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric...","description":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.","status":"published","published":"2026-06-19T03:31:27Z","modified":"2026-06-19T03:31:32Z","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"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:08:54.452189Z"}],"nvd":[{"id":"CVE-2026-8805","description":"Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.","status":"published","published":"2026-06-19T03:16:14.85Z","modified":"2026-10-26T11:10:00.157Z","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"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:24.912854Z"}]}}