{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10831","assignerOrgId":"2e0a0ee2-d866-482a-9f5e-ac03d156dbaa","state":"PUBLISHED","assignerShortName":"Moxa","dateReserved":"2026-06-04T10:11:26.724Z","datePublished":"2026-06-16T13:46:27.325Z","dateUpdated":"2026-06-16T15:27:28.093Z"},"containers":{"cna":{"providerMetadata":{"orgId":"2e0a0ee2-d866-482a-9f5e-ac03d156dbaa","shortName":"Moxa","dateUpdated":"2026-06-16T13:46:27.325Z"},"title":"Improper Authorization of Break Signal Commands in Devices","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-862","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-212","descriptions":[{"lang":"en","value":"CAPEC-212: Functionality Misuse"}]}],"affected":[{"vendor":"Moxa","product":"NPort 6000 Series","versions":[{"status":"affected","version":"1.0","lessThanOrEqual":"2.3","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Moxa","product":"CN2600 Series","versions":[{"status":"affected","version":"1.0","lessThanOrEqual":"4.6","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.</p>"}]}],"references":[{"url":"https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262370-cve-2026-10831-improper-authorization-vulnerability-in-serial-device-servers","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L"}}],"solutions":[{"lang":"en","value":"Please refer to the security advisory: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262370-cve-2026-10831-improper-authorization-vulnerability-in-serial-device-servers","supportingMedia":[{"type":"text/html","base64":false,"value":"Please refer to the security advisory:&nbsp;https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262370-cve-2026-10831-improper-authorization-vulnerability-in-serial-device-servers"}]}],"credits":[{"lang":"en","value":"Artur Witek","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T15:27:21.022805Z","id":"CVE-2026-10831","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-16T15:27:28.093Z"}}]}}