{"id":"CVE-2026-82784","state":"PUBLISHED","title":"Missing authentication for critical function vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. An attacker may execute a REST API without authentication,","description":"Missing authentication for critical function vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. An attacker may execute a REST API without authentication, which could allow the attacker to retrieve I/O values and/or control the output.","publishedAt":"2026-09-14T06:43:04.368Z","updatedAt":"2026-09-14T11:19:47.275Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","source":"jpcert"},"assigner":"jpcert","products":["Contec Co., Ltd. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*"],"affected":[{"vendor":"Contec Co., Ltd.","product":"Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.82","versionType":"semver"}]}],"references":["https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf","https://jvn.jp/en/vu/JVNVU96551518/"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82784.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82784","state":"PUBLISHED","datePublished":"2026-09-14T06:43:04.368Z","dateUpdated":"2026-09-14T11:19:47.275Z","assignerShortName":"jpcert","assignerOrgId":"ede6fdc4-6654-4307-a26d-3331c018e2ce","dateReserved":"2026-08-31T02:30:58.278Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Missing authentication for critical function vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. An attacker may execute a REST API without authentication, which could allow the attacker to retrieve I/O values and/or control the output."}],"affected":[{"vendor":"Contec Co., Ltd.","product":"Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.82","versionType":"semver"}]}],"references":[{"url":"https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf"},{"url":"https://jvn.jp/en/vu/JVNVU96551518/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}},{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV4_0":{"version":"4.0","baseSeverity":"MEDIUM","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","description":"Missing authentication for critical function","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"jpcert","orgId":"ede6fdc4-6654-4307-a26d-3331c018e2ce","dateUpdated":"2026-09-14T06:43:04.368Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-82784","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-14T11:05:59.317623Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-14T11:19:47.275Z"}}]}}}