CVE-2026-39929 Lakeside SysTrack Agent LsiAgent.exe Out-of-Bounds Read via UDP
Remote attackers can crash the Lakeside SysTrack Agent by sending a specially crafted UDP packet, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39929?
CVE-2026-39929 is a high-severity denial of service vulnerability in Lakeside Software, LLC. SysTrack Agent, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Lakeside 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.
Which versions are affected by CVE-2026-39929?
How do I fix CVE-2026-39929?
No fix has been published for CVE-2026-39929 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-39929 being exploited?
There is no known exploitation of CVE-2026-39929 in the wild and no public exploit code.
Sources
Also known as GHSA-96w5-xvg7-p24r.