LogontracerApplication · Jpcert

CVE-2026-33277

HIGH · 8.8 CVSS v3.0 Published 2026-04-27
Fix available
A fix is available. Upgrade to 2.0.0 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

LogonTracer versions prior to v2.0.0 contain an OS command injection vulnerability that allows authenticated users to execute arbitrary operating system commands on the host, likely through unsanitized input being passed to system shell calls.

MitigationUpgrade LogonTracer to v2.0.0 or later to obtain the patched version that properly sanitizes user input before passing it to OS command execution functions.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
LogontracerApplication
Affected:< 2.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if LogonTracer is installed
    Check for LogonTracer processes running on the system using 'ps aux | grep -i logontracer' or look for the application in common installation directories such as /opt, /usr/local, or the user's home directory. Also check if port 8080 or similar is listening, as LogonTracer typically runs a web interface.
    Affected if LogonTracer process or installation is found on the system
  2. Determine the installed version
    Check the version of LogonTracer by examining the application itself. Look for a version file, check the web interface login page for version information, or run 'python -m logontracer --version' if the tool is installed as a Python module. If installed from source, check VERSION file or the main script for a version string.
    Affected if The version returned is less than 2.0.0 or no version can be determined (older installation)
  3. Verify the service is accessible and running
    Confirm the LogonTracer web service is listening and accessible. Check if the process is actively running and the web interface responds to HTTP requests. Use 'netstat -tuln' or 'ss -tuln' to identify listening ports associated with LogonTracer.
    Affected if The LogonTracer service is running and accessible on the network

You are affected if LogonTracer is installed and running with a version prior to v2.0.0, as this version range contains the OS command injection vulnerability that allows authenticated users to execute arbitrary OS commands.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.0.0 or later
Fixed in 2.0.0
Interim mitigation

Upgrade LogonTracer to v2.0.0 or later to obtain the patched version that properly sanitizes user input before passing it to OS command execution functions.

Recommended fix High confidence

2.0.0

  1. 1. Back up the current LogonTracer installation and any existing configuration files
  2. 2. Stop the LogonTracer service if it is currently running
  3. 3. Download LogonTracer version 2.0.0 or later from the official repository
  4. 4. Extract the new version to replace the existing installation files
  5. 5. Restore any custom configuration files from the backup if needed
  6. 6. Start the LogonTracer service
  7. 7. Verify the application is running correctly and the web interface is accessible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Logontracer Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-33277 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-33277 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data