CriticalCISA KEVExploited in the wildPublic exploit

Unauthenticated RCE in SKYSEA Client View Management Console TCP Authentication

IdentifiersCVE-2016-7836CWE-306

CVE-2016-7836 affects SKYSEA Client View Ver.11.221.03 and earlier. The vulnerability is caused by improper authentication handling on the TCP connection used with the management console program. An attacker can interact with the exposed management service and, by abusing the authentication flaw in that TCP processing path, achieve remote code execution. Supporting content further characterizes the issue as unauthenticated remote code execution in legacy SKYSEA Client View management software and notes it has been exploited in real-world intrusion activity.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows remote code execution on the affected SKYSEA Client View system. In practice, this can enable an attacker to run arbitrary commands, install malware or backdoors, establish persistence, pivot further into the environment, and compromise the confidentiality, integrity, and availability of the host and potentially connected enterprise systems. The content also indicates the flaw has been used in active intrusion campaigns, including by Tick/REDBALDKNIGHT, to gain initial access.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, restrict network access to the SKYSEA management console TCP service to trusted administrative hosts only, remove any unnecessary internet exposure, segment management infrastructure from untrusted networks, and monitor for suspicious connections or command execution involving SKYSEA servers. Because the flaw is associated with active exploitation, compensating controls should include strict ACLs/firewalling, exposure reduction, and heightened detection for post-exploitation activity.

Remediation

Patch, then assume compromise.

Upgrade SKYSEA Client View to a fixed version newer than Ver.11.221.03. The supporting content indicates the issue was patched in March 2017, so organizations should ensure all legacy deployments are updated to a vendor-remediated release and that unsupported versions are retired. Any internet-exposed or otherwise reachable SKYSEA management components should be reviewed and remediated as a priority given confirmed exploitation.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

SkygroupSkysea Client Viewapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

12 SOURCESView more in app

the hacker newsNews

Oct 31, 2025

China-Linked Tick Group Exploits Lanscope Zero-Day to Hijack Corporate Systems

A remote code execution vulnerability in SKYSEA Client View (Japanese IT asset management software) that was exploited by Tick in past campaigns.

securityaffairsNews

Oct 16, 2025

U.S. CISA adds SKYSEA Client View, Rapid7 Velociraptor, Microsoft Windows, and IGEL OS flaws to its Known Exploited Vulnerabilities catalog

A remote code execution vulnerability in SKYSEA Client View due to improper authentication handling in TCP connections with the management console.

cyberthroneNews

Oct 16, 2025

CISA Expands KEV Catalog with Six Actively Exploited Vulnerabilities

A SKYSEA Client View management software vulnerability (improper authentication on a TCP management connection) allowing unauthenticated remote code execution; noted as reappearing in 2025 exploitation chains and ransomware playbooks, especially in legacy/unpatched deployments.

trend micro researchNews

Nov 7, 2017

REDBALDKNIGHT’s Daserf Backdoor Now Uses Steganography

A remote code execution vulnerability in SKYSEA Client View (IT asset management software) that REDBALDKNIGHT/Tick used as an infection vector alongside spearphishing and watering-hole activity.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence1

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity8

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2016-7836

NVD

nvd.nist.gov/vuln/detail/CVE-2016-7836

MITRE CWE · CWE-306

cwe.mitre.org

Vendor Advisory

skyseaclientview.net/news/161221

Third Party Advisory

securityfocus.com/bid/95062

Third Party Advisory

jvn.jp/en/jp/JVN84995847/index.html

Third Party Advisory

skygroup.jp/security-info/170308.html

US Government Resource

cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-7836