What is CVE-2019-6023?

CVE-2019-6023 is a medium-severity vulnerability in Cybozu Office. CVSS score: 4.3/10. Published 2019-12-26.

How severe is CVE-2019-6023?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Cybozu Office

CVE-2019-6023

Cybozu Office 10.0.0 to 10.8.3 allows remote authenticated attackers to bypass access restriction which may result in obtaining data without access privileges via the application 'Address'.

Published 2019-12-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Cybozu Office
Cybozu, Inc. Cybozu Office — versions 10.0.0 to 10.8.3

References

jvn.jp/en/jp/JVN79854355/index.html (VDB Entry, Third Party Advisory)
kb.cybozu.support/article/36130 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-6023?: CVE-2019-6023 is a medium-severity vulnerability in Cybozu Office. CVSS score: 4.3/10. Published 2019-12-26.
How severe is CVE-2019-6023?: Medium severity. CVSS v3 base score is 4.3 out of 10.