{"id":"CVE-2026-109439","published":"2026-10-14T17:18:23Z","modified":"2026-10-16T19:00:33Z","title":"Lantronix XPress-DR and XPress-DR-I (CoBos-family) firmware through 8.1.0.0 contains a missing authentication…","vendor":"LANTRONIX","product":"XPress-DR","tier":"core","eol":null,"description":{"text":"Lantronix XPress-DR and XPress-DR-I (CoBos-family) firmware through 8.1.0.0 contains a missing authentication vulnerability that allows remote attackers to read and persistently overwrite device configuration by sending crafted frames to the unauthenticated UDP configuration protocol on port 30718. Attackers can send a type 0xF8 query to read live configuration data and a type 0xFD frame with exactly 0x78 body bytes to rewrite the device IP address and serial-channel forwarding records, causing changes to commit to EEPROM and persist across reboots. The XPress-DR product series reached end-of-life/end-of-support in February 2025.","provenance":"source","from":"NVD"},"summary":{"text":"The Lantronix XPress-DR and XPress-DR-I devices (CoBos-family firmware through 8.1.0.0) have a missing authentication flaw in their UDP configuration protocol on port 30718, which accepts unauthenticated frames. A remote attacker with network access to that port, requiring no credentials, user interaction, or special configuration, can read live device configuration and persistently overwrite the device IP address and serial-channel forwarding records, with changes committed to EEPROM and surviving reboots.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:17:47Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.00618,"percentile":0.49529,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":{"pulseCount":8,"pulses":[{"name":"Known_Cve | Oct 23, 2026 | Part 1/3","url":"https://otx.alienvault.com/pulse/6ada23770d71749da2321a29","created":"2026-10-22"},{"name":"Known_Cve | Oct 22, 2026 | Part 2/4","url":"https://otx.alienvault.com/pulse/6ad8d3466c8181f05516bab7","created":"2026-10-21"},{"name":"Known_Cve | Oct 21, 2026 | Part 3/4","url":"https://otx.alienvault.com/pulse/6ad78144340f998d3db4d0bc","created":"2026-10-20"},{"name":"Known_Cve | Oct 20, 2026 | Part 3/4","url":"https://otx.alienvault.com/pulse/6ad62f761b14c745b837b947","created":"2026-10-19"},{"name":"Known_Cve | Oct 19, 2026 | Part 3/4","url":"https://otx.alienvault.com/pulse/6ad4ddb44d734735b605dc2f","created":"2026-10-18"},{"name":"Known_Cve | Oct 18, 2026 | Part 3/4","url":"https://otx.alienvault.com/pulse/6ad38c34c49c0273168a0f7d","created":"2026-10-17"},{"name":"Known_Cve | Oct 17, 2026 | Part 3/4","url":"https://otx.alienvault.com/pulse/6ad23abd6cb9332fcbb88e3b","created":"2026-10-16"},{"name":"Known_Cve | Oct 16, 2026 | Part 3/3","url":"https://otx.alienvault.com/pulse/6ad0e94086fc75fcda994436","created":"2026-10-15"}],"provenance":"machine"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"references":[{"url":"https://cdn.lantronix.com/wp-content/uploads/pdf/PCN-753-Rev-B-EOL-Notice-XPRESS.pdf?xnotes__c=I%20am%20interested%20in%20the%20XPress%20DR%20/%20XPress%20DR-IAP.","tags":[]},{"url":"https://www.vulncheck.com/advisories/lantronix-xpress-dr-unauthenticated-configuration-write-via-udp-30718","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-101337","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101337","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-14","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109439","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":18.9,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":9.91,"detail":"percentile 0.4953"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":2.17,"detail":"8 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}