Vulnerability · Published Apr 27, 2026 · Assigned by jpcert
CVE-2026-33566
Medium 4.3
In plain English
A medium-severity security flaw in LogonTracer from Japan Computer Emergency Response Team Coordination Center (JPCERT/CC). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.0)4.3Medium
Exploit odds (30 days)0.2%top 92.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) | LogonTracer | prior to v2.0.0 |
Weakness: CWE-943 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N