What is CVE-2016-7836?

CVE-2016-7836 is a critical-severity vulnerability in Sky Co., Ltd. Skysea Client View, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-06-09.

How severe is CVE-2016-7836?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2016-7836 known to be exploited?

Yes. CVE-2016-7836 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-14), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Auth bypass in Sky Co., Ltd. Skysea Client View

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 the management console program.

Vulnerability class: Broken Authentication

Published 2017-06-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.192 (97.3th percentile), scored 2026-10-19.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.192 · newest: 0.192 · change: 0.000

Affected products

Sky Co., Ltd. Skysea Client View — versions Ver.11.221.03 and earlier
Skygroup Skysea Client View

Weakness classification (CWE)

CWE-287 — Improper Authentication

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-10-14. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2025-11-04.

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.

Public proof-of-concept exploits

References

www.skyseaclientview.net/news/161221/ (Vendor Advisory)
www.skygroup.jp/security-info/170308.html (Technical Description, Exploit, Third Party Advisory)
jvn.jp/en/jp/JVN84995847/index.html (VDB Entry, Third Party Advisory, third-party-advisory)
www.securityfocus.com/bid/95062 (VDB Entry, Third Party Advisory, vdb-entry)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2016-7836?: CVE-2016-7836 is a critical-severity vulnerability in Sky Co., Ltd. Skysea Client View, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-06-09.
How severe is CVE-2016-7836?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-7836 known to be exploited?: Yes. CVE-2016-7836 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-14), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.