Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain low-privilege session on SKYSEA-managed host
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DeliveryCraft UDP packet with path traversal payload
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ExploitSend packet to target SKYSEA host via UDP
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ExecutionTarget processes traversal without sanitization
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PersistWrite or execute arbitrary file on target
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ImpactAchieve 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. |
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Alert meAnalysisAIv1 – 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
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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
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
Low-privilege authenticated user sends crafted UDP to reach target systems; scope changes as RCE lands on a different host entirely.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
3DescriptionCVE.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
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.
What every action level means
SSVC AssessmentENISA
Priority Score
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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NVD
CVE.org
EPSS
Vulnrichment
Exploit-DB