What is CVE-2021-40654?

CVE-2021-40654 is a medium-severity vulnerability in Dlink Dir-615, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-09-24.

How severe is CVE-2021-40654?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Dlink Dir-615

CVE-2021-40654

An information disclosure issue exist in D-LINK-DIR-615 B2 2.01mt. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page

Vulnerability class: Broken Access Control

Published 2021-09-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.019 (78.9th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Dlink Dir-615 — versions q1
Dlink Dir-615 Firmware — versions 17.00

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
github.com/Ilovewomen/D-LINK-DIR-615 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-40654?: CVE-2021-40654 is a medium-severity vulnerability in Dlink Dir-615, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-09-24.
How severe is CVE-2021-40654?: Medium severity. CVSS v3 base score is 6.5 out of 10.