CVE-2026-13133

Code execution via installer DLL search-order hijacking

Published Aug 10, 2026 · Updated Aug 10, 2026

DLL search-order hijacking in LY Corporation LINE for Windows before 26.4.0 allows local users to execute code during installation. LineInst.exe requests Msftedit.dll by relative name without establishing a secure DLL search path, so Windows loads an attacker-supplied copy from the installer's directory before the System32 library. Exploitation requires a user to run that installer; the substituted DLL executes with the installer's privileges.

CVSS severity8.4
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL search-order hijacking in LY Corporation LINE for Windows before 26.4.0 allows local users to execute code during installation. LineInst.exe requests Msftedit.dll by relative name without establishing a secure DLL search path, so Windows loads an attacker-supplied copy from the installer's directory before the System32 library. Exploitation requires a user to run that installer; the substituted DLL executes with the installer's privileges.

The record

CVE
CVE-2026-13133
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
LY Corporation
Product
LINE for Windows
Classifications
CWE-427, T1574.002, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

LY Corporation · LINE for WindowsAffected versions are unavailable in this record.

Published CVSS scores

7.8IPACVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4LY CorporationCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.002DLL Side-Loading
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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