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CVE-2026-13133

Quick assessment

Affected
LY Corporation LINE for Windows
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LY LINE是日本LY公司的一款即时通讯客户端软件。 LY LINE 26.4.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于通过相对路径加载Msftedit.dll且未使用安全DLL搜索路径，可能导致恶意DLL被加载执行。

CVSS 8.4 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 2 AI

T1218.014 · MMC T1574.001 · DLL

Affected Version Matrix 1

VendorProduct Version RangeStatus
LY Corporation LINE for Windows 26.4.0< * unaffected
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I. Basic Information for CVE-2026-13133

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in LineInst.exe (LINE for Windows) prior to version 26.4.0, where Msftedit.dll is loaded via a relative path without a secure DLL search path, allowing a malicious DLL placed in the installer's directory to be loaded ahead of the legitimate System32 copy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
LY LINE 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LY LINE是日本LY公司的一款即时通讯客户端软件。 LY LINE 26.4.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于通过相对路径加载Msftedit.dll且未使用安全DLL搜索路径，可能导致恶意DLL被加载执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LY Corporation LINE for Windows 26.4.0 ~ * -

II. Public POCs for CVE-2026-13133

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III. Intelligence Information for CVE-2026-13133

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Security Blog Posts for CVE-2026-13133 (1)

IV. Related Vulnerabilities

Same product: LINE for Windows
Same vendor: LY Corporation

V. Comments for CVE-2026-13133

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