[Japanese]

JVNDB-2026-000053

EmoCheck loads Dynamic Link Libraries insecurely

Overview

EmoCheck is a tool for detecting infections by "Emotet" malware, provided by Japan Computer Emergency Response Team Coordination Center (JPCERT/CC). EmoCheck loads Dynamic Link Libraries insecurely.
  • Uncontrolled search path element (CWE-427) - CVE-2026-28704
ryo shimada of Powder Keg Technologies, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated internally under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 7.8 (High) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS v4 Severity
Base Metrics: 8.4 (High) [IPA Score]
  • Access Vector (AV): Local
  • Attack Complexity (AC): Low
  • Attack Requirements (AT): None
  • Privileges Required (PR): None
  • User Interaction (UI): Active
    • Vulnerable System Impact
  • Confidentiality Impact (VC): High
  • Integrity Impact (VI): High
  • Availability Impact (VA): High
    • Subsequent System Impact
  • Confidentiality Impact (SC): None
  • Integrity Impact (SI): None
  • Availability Impact (SA): None
Affected Products


JPCERT Coordination Center
  • EmoCheck all versions

Impact

Arbitrary code may be executed with the privilege of the user invoking EmoCheck.
Solution

[Stop using EmoCheck]
EmoCheck is no longer available. It is recommended that users stop using EmoCheck.
Vendor Information

JPCERT Coordination Center
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2026-28704
References

  1. JVN : JVN#00263243
  2. JVN : JVNTA#91240916
Revision History

  • [2026/04/10]
      Web page was published

Date Public2026/04/10
Date First Published2026/04/10
Date Last Updated2026/04/10