CVE WatchOct 16, 2026

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 remo

CVSS

9.8

Critical

EPSS

0.6%

p49

KEV

—

Exploit Today

0-100

Published: Oct 14, 2026 · Last modified: Oct 16, 2026 · CWE-306

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-10-152026-10-20

Technical description

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.

Official references

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