CVE-2026-39929
CVE-2026-39929 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 8.7
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-33066
- Weakness: CWE-125
- Published:
- Last modified:
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.
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.
- How severe is CVE-2026-39929?
- CVE-2026-39929 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-39929 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-39929?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-39929 have an EU (EUVD) identifier?
- Yes. CVE-2026-39929 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33066.
- When was CVE-2026-39929 published?
- CVE-2026-39929 was published on 2026-05-28 and last updated on 2026-06-17.
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
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