What is CVE-2018-6210?

CVE-2018-6210 is a critical-severity vulnerability in Dlink Dir-620, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2018-06-19.

How severe is CVE-2018-6210?

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

Vulnerability in Dlink Dir-620

CVE-2018-6210

D-Link DIR-620 devices, with a certain Rostelekom variant of firmware 1.0.37, have a hardcoded rostel account, which makes it easier for remote attackers to obtain access via a TELNET session.

Published 2018-06-19 · 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: 0.031 (87.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Dlink Dir-620
Dlink Dir-620 Firmware — versions 1.0.37

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

securelist.com/backdoors-in-d-links-backyard/85530/ (Third Party Advisory)

Frequently asked questions

What is CVE-2018-6210?: CVE-2018-6210 is a critical-severity vulnerability in Dlink Dir-620, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2018-06-19.
How severe is CVE-2018-6210?: Critical severity. CVSS v3 base score is 9.8 out of 10.