What is CVE-2020-17475?

CVE-2020-17475 is a high-severity vulnerability in Megvii Koala, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2020-08-14.

How severe is CVE-2020-17475?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Megvii Koala

CVE-2020-17475

Lack of authentication in the network relays used in MEGVII Koala 2.9.1-c3s allows attackers to grant physical access to anyone by sending packet data to UDP port 5000.

Vulnerability class: Broken Authentication

Published 2020-08-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.1th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Megvii Koala
Megvii Koala Firmware — versions 2.9.1-c3s

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.trendmicro.com/vinfo/us/threat-encyclopedia/vulnerability/8137/megvii-koala… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-17475?: CVE-2020-17475 is a high-severity vulnerability in Megvii Koala, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2020-08-14.
How severe is CVE-2020-17475?: High severity. CVSS v3 base score is 7.5 out of 10.