Vulnerability in Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Logontracer
CVE-2026-33566
There is a cypher injection issue in LogonTracer prior to v2.0.0. If specially crafted Windows event log data is loaded, the contents of the database may be altered.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Logontracer — versions prior to v2.0.0
- Jpcert Logontracer
Weakness classification (CWE)
References
- www.jpcert.or.jp/press/2026/PR20260423.html (Third Party Advisory)
- jvn.jp/en/jp/JVN57877356/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-33566?
- CVE-2026-33566 is a medium-severity vulnerability in Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Logontracer, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 4.3/10. Published 2026-04-27.
- How severe is CVE-2026-33566?
- Medium severity. CVSS v3 base score is 4.3 out of 10.