What is CVE-2020-3934?

CVE-2020-3934 is a critical-severity vulnerability in Secom Dr.id Access Control, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-02-11.

How severe is CVE-2020-3934?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SQL Injection in Secom Dr.id Access Control

CVE-2020-3934

TAIWAN SECOM CO., LTD., a Door Access Control and Personnel Attendance Management system, contains a vulnerability of Pre-auth SQL Injection, allowing attackers to inject a specific SQL command.

Vulnerability class: SQL Injection

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · 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

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.chtsecurity.com/news/1bb85fcd-9048-4587-b4d3-b18335572bac (Third Party Advisory)
gist.github.com/chtsecurity/4db471b34c3959e5ab9ec31570e4760b (Third Party Advisory)
www.twcert.org.tw/en/cp-139-3318-89f76-2.html (Third Party Advisory)

Frequently asked questions

What is CVE-2020-3934?: CVE-2020-3934 is a critical-severity vulnerability in Secom Dr.id Access Control, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-02-11.
How severe is CVE-2020-3934?: Critical severity. CVSS v3 base score is 9.8 out of 10.