CVE-2026-33566

MEDIUM
Published Apr 27, 2026 Modified Apr 28, 2026 CWE-943

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.

CVSS v3.1 Score

4.3
MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0004
Probability of exploitation
0.11%
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-943 CWE-943

Affected Products

Vendor Product
jpcert logontracer

References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2026-33566? +
CVE-2026-33566 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0004, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-33566? +
CVE-2026-33566 affects products from jpcert, specifically: logontracer. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-33566? +
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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