CVE-2026-39929
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 · uneditedLakeside SysTrack Agent versions prior to 11.2.1.28, 11.3.0.38, 11.4.0.24, 11.5.0.15 contain an out-of-bounds read vulnerability in the Command ID 30 UDP packet handler that allows remote attackers to crash the application by sending a specially crafted UDP packet. Attackers can send a malformed packet with an invalid memory address at offset 0x4 in the payload to trigger an access violation and cause a denial of service.
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 confidenceLakeside SysTrack Agent contains an out-of-bounds read vulnerability in its Command ID 30 UDP packet handler. Remote attackers can crash the application by sending a specially crafted UDP packet with an invalid memory address at offset 0x4, triggering an access violation and causing denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Confirm SysTrack Agent is installed and runningCheck for the SysTrack service or process (e.g., run 'sc query SysTrack' on Windows or 'ps aux | grep -i systrack' on Linux). Also check for installation directory (commonly C:\Program Files\SysTrack or /opt/systrack).Affected if The SysTrack Agent service or process is present and running on the system.
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Identify the installed SysTrack Agent versionCheck the version of the SysTrack Agent executable or service. On Windows, right-click the SysTrack executable in the installation directory, select Properties, and view the Details tab for File Version. Alternatively, use 'wmic product get name,version' or check the registry under HKLM\Software\SysTrack. On Linux, check /opt/systrack/version or run 'systrack --version' if available.Affected if The installed version is before 11.2.1.28, 11.3.0.38, 11.4.0.24, or 11.5.0.15.
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Verify the UDP listener service is enabledDetermine if the SysTrack Agent UDP service is actively listening. On Windows, run 'netstat -an | findstr UDP' and look for SysTrack-related UDP ports (commonly port 4567 or configurable). On Linux, run 'netstat -ulnp | grep systrack' or 'ss -ulnp | grep systrack'. Check the SysTrack configuration files for UDP port settings.Affected if The SysTrack Agent UDP listener is enabled and bound to a port, meaning Command ID 30 packets can be received.
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Assess network exposure of the UDP listenerReview firewall rules and network configuration to determine if the SysTrack UDP port is accessible from untrusted networks. Run 'netsh advfirewall firewall show rule name=all' on Windows or 'iptables -L' on Linux to inspect inbound rules. Check if the UDP port is bound to 0.0.0.0 (all interfaces) versus localhost only.Affected if The SysTrack UDP port is exposed to untrusted or external network segments, allowing remote attackers to send malformed Command ID 30 packets.
A system is affected if it runs a vulnerable SysTrack Agent version (below 11.2.1.28/11.3.0.38/11.4.0.24/11.5.0.15) with the UDP listener enabled and accessible from untrusted networks, enabling remote attackers to trigger the out-of-bounds read via Command ID 30 packets.
Generated from the published advisory. Verify against your own configuration.
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 · scopedUpdate SysTrack Agent to version 11.2.1.28, 11.3.0.38, 11.4.0.24, 11.5.0.15 or later. Consider restricting UDP access to the agent if updates cannot be applied immediately.
Upgrade to Lakeside SysTrack Agent version 11.5.0.15 or later (or at minimum 11.2.1.28, 11.3.0.38, or 11.4.0.24 depending on your release track)
- 1. Identify the current installed version of Lakeside SysTrack Agent by checking the application properties or using the system's installed programs list.
- 2. If the installed version is prior to 11.2.1.28, 11.3.0.38, 11.4.0.24, or 11.5.0.15, determine which upgrade path is appropriate for your deployment (e.g., 11.2.x, 11.3.x, 11.4.x, or 11.5.x).
- 3. Obtain the updated SysTrack Agent installer from the official Lakeside Software download portal or your licensed distribution channel.
- 4. Test the upgrade in a non-production environment to verify compatibility with your existing systems and configurations.
- 5. Apply the upgrade during a planned maintenance window to minimize service disruption.
- 6. After upgrading, verify that the SysTrack Agent service is running correctly and that Command ID 30 UDP packet handling no longer triggers the out-of-bounds read.
- 7. Confirm the installed version matches the expected fixed release (11.2.1.28 or higher, with 11.5.0.15 being the latest stable fixed version).
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-39929 — 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 sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-39929 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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