CVE-2026-78239

CRITICAL 9.8

Xiiaozet LK100W Missing Authentication for Critical Function

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Xiiaozet LK100W exposes a critical management function that can be invoked without authentication, allowing a remote attacker to enable administrative services that should be restricted. Successful exploitation may permit unauthorized access to the device.

CWE	CWE-306
Vendor	xiiaozet
Product	xiiaozet lk100w
Published	Aug 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Xiiaozet / Xiiaozet LK100W

0 < 2.1.240

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-239-01 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-239-01.json

Credits

Byron Guernsey of Okachobi, LLC reported this vulnerability to CISA.