JVN#57877356
Multiple vulnerabilities in LogonTracer

Overview

LogonTracer provided by Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) contains multiple vulnerabilities.

Products Affected

• LogonTracer prior to v2.0.0

Description

LogonTracer provided by Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) is a tool to investigate malicious Windows logons by visualizing and analyzing Windows event logs.
LogonTracer contains multiple vulnerabilities listed below.

• OS command injection (CWE-78)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N Base Score 8.7
  • CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Base Score 8.8
  • CVE-2026-33277
• Improper neutralization of special elements in data query logic (CWE-943)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Base Score 5.1
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Base Score 4.3
  • CVE-2026-33566

Impact

• An arbitrary OS command may be executed by a logged-in user (CVE-2026-33277)
• If specially crafted Windows event log data is loaded, the contents of the database may be altered (CVE-2026-33566)

Solution

Update the Software
Update the software to the latest version.
The developer has released the following version to address these vulnerabilities.

• LogonTracer v2.0.0