9.8

CVE-2026-109439

CVSS: 9.8v3.1CriticalReceived
Published 2026-10-14Last modified 2026-10-14
Open JSON

Vulnerability summary

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (cve.org)
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listed0 of 3 catalogs
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 2026-10-14
    PublishedVulnerability first disclosed.

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.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Lantronix2 products
  • xpress-dr≤ 8.1.0.0
  • xpress-dr-i≤ 8.1.0.0

1 vendor · 2 products

References

2 links