---
title: "CVE-2016-7836: SKYSEA Client View Improper Authentication Vulnerability"
url: https://erroneo.us/security/cve/CVE-2016-7836/
description: "CVE-2016-7836 (SKYSEA Client View): Exploited in the wild (CISA KEV). SKYSEA Client View Ver.11.221.03 and earlier allows remote code execution via a flaw…"
type: vulnerability-record
section: "Security Digest"
date_published: 2017-06-09
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2016-7836"
kev: true
cvss: 9.8
epss: 0.1923
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2016-7836: SKYSEA Client View Improper Authentication Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run SKYSEA Client View. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-10-14, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-11-04 ; treat that as the outer limit, not the target.
- EPSS 19.2% , percentile 97: FIRST’s model estimates a 19.2% chance of exploitation activity in the next 30 days, higher than 97% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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.

## Affected products (CVE record)

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

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-10-14; federal due date 2025-11-04. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 19.23% probability of exploitation activity in the next 30 days; percentile 97.

## Sources

- [Listed in CISA KEV notes (skyseaclientview.net)](https://www.skyseaclientview.net/news/161221/)
- [CVE.org record CVE-2016-7836](https://www.cve.org/CVERecord?id=CVE-2016-7836)
- [NVD entry CVE-2016-7836](https://nvd.nist.gov/vuln/detail/CVE-2016-7836)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-7836)
- [skyseaclientview.net](http://www.skyseaclientview.net/news/161221/)
- [skygroup.jp](https://www.skygroup.jp/security-info/170308.html)
- [JVN#84995847](https://jvn.jp/en/jp/JVN84995847/index.html)
- [95062](http://www.securityfocus.com/bid/95062)

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Source page: https://erroneo.us/security/cve/CVE-2016-7836/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt