CVE-2026-78239 PUBLISHED

Xiiaozet LK100W Missing Authentication for Critical Function

Assigner: icscert
Reserved: 25.08.2026 Published: 27.08.2026 Updated: 28.08.2026

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.

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Xiiaozet
Product	Xiiaozet LK100W
Versions	Default: unaffected affected from 0 to 2.1.240 (excl.) Version 2.1.240 is unaffected

Solutions

Xiiaozet recommends users update to v2.1.240.

Credits

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

References

Problem Types

CWE-306 CWE