CRITICAL 9.3 NVD
CVE-2026-109439
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
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.
References
- https://cdn.lantronix.com/wp-content/uploads/pdf/PCN-753-Rev-B-EOL-Notice-XPRESS.pdf?xnote
- https://www.vulncheck.com/advisories/lantronix-xpress-dr-unauthenticated-configuration-wri
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-10-14 via NVD.
Risk Timeline
CVE Disclosed2026-10-14 · -1 days ago
Remediation Resources
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