What is CVE-2020-3933?

CVE-2020-3933 is a medium-severity vulnerability in Secom Dr.id Access Control. CVSS score: 5.3/10. Published 2020-02-11.

How severe is CVE-2020-3933?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Secom Dr.id Access Control

CVE-2020-3933

TAIWAN SECOM CO., LTD., a Door Access Control and Personnel Attendance Management system, allows attackers to enumerate and exam user account in the system.

Published 2020-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (68.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Secom Dr.id Access Control
Secom Dr.id Attendance System
Taiwan Secom Co., Ltd. Door Access Control System — versions 0
Taiwan Secom Co., Ltd. Personnel Attendance System — versions 0

References

www.twcert.org.tw/en/cp-139-3317-d4edc-2.html (Third Party Advisory)
www.chtsecurity.com/news/1bb85fcd-9048-4587-b4d3-b18335572bac (Third Party Advisory)
gist.github.com/chtsecurity/4db471b34c3959e5ab9ec31570e4760b (Third Party Advisory)

Frequently asked questions

What is CVE-2020-3933?: CVE-2020-3933 is a medium-severity vulnerability in Secom Dr.id Access Control. CVSS score: 5.3/10. Published 2020-02-11.
How severe is CVE-2020-3933?: Medium severity. CVSS v3 base score is 5.3 out of 10.