What is CVE-2021-43483?

CVE-2021-43483 is a high-severity vulnerability in Claro Kaon Cg3000, classified under Missing Authentication for Critical Function. CVSS score: 8.0/10. Published 2022-04-08.

How severe is CVE-2021-43483?

High severity. CVSS v3 base score is 8.0 out of 10.

Auth bypass in Claro Kaon Cg3000

CVE-2021-43483

An Access Control vulnerability exists in CLARO KAON CG3000 1.00.67 in the router configuration, which could allow a malicious user to read or update the configuraiton without authentication.

Vulnerability class: Broken Authentication

Published 2022-04-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.6th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% 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

Claro Kaon Cg3000
Claro Kaon Cg3000 Firmware — versions 1.00.67

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

alexandrevvo.medium.com/improper-access-control-no-control-at-all-in-kaon-cg300… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43483?: CVE-2021-43483 is a high-severity vulnerability in Claro Kaon Cg3000, classified under Missing Authentication for Critical Function. CVSS score: 8.0/10. Published 2022-04-08.
How severe is CVE-2021-43483?: High severity. CVSS v3 base score is 8.0 out of 10.