CVE-2026-39929

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.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0140

Probability of exploitation

0.69%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

CWE-754 CWE-754

References

Other References

https://documentation.lakesidesoftware.com/docs/112128-hotfix-agent-release-notes https://documentation.lakesidesoftware.com/docs/1130xxx-hotfix-agent-release-notes https://documentation.lakesidesoftware.com/docs/1140xxx-hotfix-agent-release-notes https://documentation.lakesidesoftware.com/docs/1150xxx-hotfix-agent-release-notes https://www.vulncheck.com/advisories/lakeside-systrack-agent-lsiagent-exe-out-of-bounds-read-via-udp

Frequently Asked Questions

What is CVE-2026-39929? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-39929? +

CVE-2026-39929 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0140, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-39929? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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