CVE-2026-39454

Description

SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. configure the installation folder with improper file access permission settings. A non-administrative user may manipulate and/or place arbitrary files within the installation folder of the product. As a result, arbitrary code may be executed with the administrative privilege.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-276 Incorrect Default Permissions

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
skygroup	skymec_it_manager	< 2024.005.10a
skygroup	skysea_client_view	< 21.200.07j

References

Advisories & Patches

https://www.skyseaclientview.net/news/260420_01/

Other References

https://jvn.jp/en/jp/JVN63376363/

Frequently Asked Questions

What is CVE-2026-39454? +

SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. configure the installation folder with improper file access permission settings. A non-administrative user may manipulate and/or place arbitrary files within the installation folder of the product. As a result, arbitrary code may be executed with the administrative privilege. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-39454? +

CVE-2026-39454 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-39454? +

CVE-2026-39454 affects products from skygroup, specifically: skymec_it_manager, skysea_client_view. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-39454? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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