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SKYSEA Client View CVE-2026-68062

| EUVDEUVD-2026-65309 MEDIUM
Path Traversal (CWE-22)
2026-08-25 jpcert GHSA-xfqq-c6x5-hw96
5.8
CVSS 4.0 · Vendor: jpcert
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Gain low-privilege session on SKYSEA-managed host
  2. Delivery
    Craft UDP packet with path traversal payload
  3. Exploit
    Send packet to target SKYSEA host via UDP
  4. Execution
    Target processes traversal without sanitization
  5. Persist
    Write or execute arbitrary file on target
  6. Impact
    Achieve remote code execution on target system

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

The attacker must hold a valid, low-privilege Windows login session on a host where SKYSEA Client View or SKYMEC IT Manager is installed - this is the PR:L requirement confirmed by the CVSS 4.0 vector. The target system must independently have SKYSEA Client View or SKYMEC IT Manager installed and must be reachable via UDP from the attacker's host; this UDP-reachability is the AT:P specific attack requirement in the CVSS 4.0 vector and represents normal operational connectivity in any managed SKYSEA fleet. There is no requirement for physical access, elevated privileges, or user interaction on the target. What limits exploitation is that the attacker must already have authenticated access to a managed endpoint (ruling out fully external attackers with no foothold), and the target must be within UDP communication range - network segmentation that isolates management traffic would constrain lateral reach.

Impact

The CVSS 4.0 score of 5.8 reflects the AT:P (attack requirements present) modifier, which tempers what would otherwise be a higher base score given SC:H/SI:H/SA:H subsequent-system impact. The realistic risk is higher than the numeric score implies for organizations with broad SKYSEA deployments: the AT:P condition is simply UDP reachability between managed hosts, which is the normal operational state of any fleet using this software - meaning the prerequisite is met by design in target environments. PR:L requires only a low-privilege Windows session on one managed endpoint, a bar easily cleared by an insider, compromised workstation, or lateral-movement foothold. The incomplete-fix lineage (CVE-2024-41726) is a compounding factor: organizations that applied the earlier patch may have false confidence in their remediation status. No EPSS data was provided, and no CISA KEV listing exists, suggesting exploitation has not been observed at scale; however, the path traversal-to-RCE class and the network-propagation mechanism mean that even a mid-sized enterprise IT operation should treat this as urgent once a new patch is confirmed available. The absence of a public exploit is the primary factor limiting near-term risk.

Exploit ScenarioDerived

An attacker who has obtained a low-privilege Windows session on a workstation running SKYSEA Client View - through phishing, credential theft, or an existing foothold - crafts a path-traversal payload exploiting the incomplete patch and transmits it as a UDP management message to another SKYSEA-managed host on the same network segment. The receiving host processes the traversal sequence without adequate sanitization, allowing the attacker to write or execute an arbitrary file, achieving remote code execution on the second system without any interaction from its users. No public proof-of-concept code has been identified at time of analysis, but the explicit incomplete-fix disclosure lowers the research effort required to develop one.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.7% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 25, 2026

Lateral code execution via path traversal in SKYSEA Client View and SKYMEC IT Manager allows a low-privileged user authenticated to one Windows host running the software to execute arbitrary code on other Windows hosts where the product is installed, provided those targets are reachable via UDP. The vulnerability (CWE-22) is a bypass of the incomplete patch for CVE-2024-41726, meaning prior remediation efforts are insufficient. No public exploit code or CISA KEV listing has been identified at time of analysis, but the RCE-class impact on subsequent systems - reflected in CVSS 4.0 SC:H/SI:H/SA:H - makes this a meaningful lateral movement risk in enterprise environments running SKY Co. products.

RemediationAI

Apply the patch issued by SKY Co., Ltd. as documented in the vendor advisory at https://www.skyseaclientview.net/news/260824_01/. Because this CVE is explicitly an incomplete fix for CVE-2024-41726, organizations that previously patched for CVE-2024-41726 must apply this new update regardless - the prior remediation does not cover this bypass. Exact fixed version numbers should be obtained directly from the vendor advisory, as the NVD CPE data does not enumerate a specific fixed release. As a compensating control while patching, restrict UDP traffic between endpoints at the host firewall or network segmentation layer to limit which systems can initiate management communications to other SKYSEA-managed hosts; this reduces the blast radius by preventing arbitrary lateral traversal across the managed fleet. Note that blocking UDP inter-agent traffic may degrade SKYSEA management functionality and should be treated as a temporary measure only.

Affected VersionsENISA

SKYMEC IT Manager Ver.2024.005.10a
SKYSEA Client View Ver.19.300.09h ≤Ver.21.210.01f

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

SKYSEA Client View and SKYMEC IT Manager (CPE: cpe:2.3:a:sky_co.,_ltd.:skysea_client_view:*:*:*:*:*:*:*:* and cpe:2.3:a:sky_co.,_ltd.:skymec_it_manager:*:*:*:*:*:*:*:*) are Windows-based IT asset and endpoint management platforms developed by SKY Co., Ltd. and primarily deployed in Japanese enterprise environments. The products use UDP-based inter-agent communication for management tasks. The root cause is CWE-22 (Path Traversal): the software fails to adequately sanitize user- or attacker-controlled path components in messages transmitted over UDP, allowing directory traversal sequences to escape intended file or execution boundaries on the receiving host. The CVSS 4.0 vector confirms the attack originates over the network (AV:N) with specific attack requirements (AT:P), and that the vulnerable system itself is unaffected (VC:N/VI:N/VA:N) while the subsequent system - the UDP-receiving target - suffers full confidentiality, integrity, and availability compromise (SC:H/SI:H/SA:H). This is explicitly identified as an incomplete fix for CVE-2024-41726, indicating the original patch failed to cover all traversal paths or encoding variants.

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Severity by source

Vendor (jpcert) PRIMARY 5.8 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
vuln.today AI 9.9 CRITICAL

Low-privilege authenticated user sends crafted UDP to reach target systems; scope changes as RCE lands on a different host entirely.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Primary rating from Vendor (jpcert).

CVSS VectorVendor: jpcert

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
High
Subsequent system: Integrity
High
Subsequent system: Availability
High

Lifecycle Timeline

3
Severity Changed
Aug 25, 2026 - 07:22 NVD
HIGH MEDIUM
CVSS changed
Aug 25, 2026 - 07:22 NVD
8.5 (HIGH) 5.8 (MEDIUM)
CVE Published
Aug 25, 2026 - 06:27 cve.org
MEDIUM 5.8

DescriptionCVE.org

SKYSEA Client View and SKYMEC IT Manager contain a path traversal vulnerability. If this vulnerability is exploited, an attacker who can log in to a Windows system on which the affected product is installed may be able to execute arbitrary code on another Windows system that has the affected products installed and can receive UDP packets from that system. Note that this vulnerability is due to an incomplete fix for CVE-2024-41726.

Threat Intelligence Overview

EPSS Score
0.7%
Top 51% exploitable
Prevalence
Low
Japan-market IT asset manager, limited global deployment footprint
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.7%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +29
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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9.8 Jun 09

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CVE-2026-66109 HIGH
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Local privilege escalation to SYSTEM in SKYSEA Client View and SKYMEC IT Manager allows any authenticated Windows user t

CVE-2026-69665 HIGH
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Privilege escalation to SYSTEM in SKYSEA Client View and SKYMEC IT Manager (Sky Co., Ltd.) affects any Windows host wher

CVE-2026-39454 HIGH
8.5 Apr 20

Local privilege escalation in SKYSEA Client View (≤21.200.07j) and SKYMEC IT Manager (≤2024.005.10a) allows low-privileg

CVE-2024-41143 HIGH
7.8 Jul 29

Origin validation error vulnerability exists in SKYSEA Client View Ver.3.013.00 to Ver.19.210.04e. Rated high severity (

CVE-2024-41139 HIGH
7.8 Jul 29

Incorrect privilege assignment vulnerability exists in SKYSEA Client View Ver.6.010.06 to Ver.19.210.04e. Rated high sev

CVE-2024-21805 HIGH
7.8 Mar 12

Improper access control vulnerability exists in the specific folder of SKYSEA Client View versions from Ver.16.100 prior

CVE-2021-20616 HIGH
7.8 Jan 13

Untrusted search path vulnerability in the installer of SKYSEA Client View Ver.1.020.05b to Ver.16.001.01g allows an att

CVE-2020-5617 HIGH
7.8 Aug 04

Privilege escalation vulnerability in SKYSEA Client View Ver.12.200.12n to 15.210.05f allows an attacker to obtain unaut

CVE-2024-41726 HIGH
7.5 Jul 29

Path traversal vulnerability exists in SKYSEA Client View Ver.3.013.00 to Ver.19.210.04e. Rated high severity (CVSS 7.5)

CVE-2024-24964 MEDIUM
6.3 Mar 12

Improper access control vulnerability exists in the resident process of SKYSEA Client View versions from Ver.11.220 prio

CVE-2026-68959 MEDIUM
5.8 Aug 25

Path traversal in SKYSEA Client View and SKYMEC IT Manager enables a locally-authenticated Windows user to execute arbit

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