What is CVE-2020-7873?

CVE-2020-7873 is a high-severity vulnerability in Ksystem K-System Wellcomm, classified under Download of Code Without Integrity Check. CVSS score: 8.8/10. Published 2021-09-09.

How severe is CVE-2020-7873?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Ksystem K-System Wellcomm

CVE-2020-7873

Download of code without integrity check vulnerability in ActiveX control of Younglimwon Co., Ltd allows the attacker to cause a arbitrary file download and execution.

Published 2021-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Ksystem K-System Wellcomm — versions 1.1, 4.0
Younglimwon Co., Ltd K-System Wellcomm — versions 1.1, 4.0

Weakness classification (CWE)

CWE-494 — Download of Code Without Integrity Check

References

www.boho.or.kr/krcert/secNoticeView.do (Third Party Advisory)

Frequently asked questions

What is CVE-2020-7873?: CVE-2020-7873 is a high-severity vulnerability in Ksystem K-System Wellcomm, classified under Download of Code Without Integrity Check. CVSS score: 8.8/10. Published 2021-09-09.
How severe is CVE-2020-7873?: High severity. CVSS v3 base score is 8.8 out of 10.