What is CVE-2019-9124?

CVE-2019-9124 is a critical-severity vulnerability in D-Link Dir-878 Firmware, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-02-25.

How severe is CVE-2019-9124?

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

Auth bypass in D-Link Dir-878 Firmware

CVE-2019-9124

An issue was discovered on D-Link DIR-878 1.12B01 devices. At the /HNAP1 URI, an attacker can log in with a blank password.

Vulnerability class: Broken Authentication

Published 2019-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (81.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

D-Link Dir-878 Firmware — versions 1.12b01
Dlink Dir-878

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/WhooAmii/whooamii.github.io/blob/master/2018/DIR-878/blankpassword.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-9124?: CVE-2019-9124 is a critical-severity vulnerability in D-Link Dir-878 Firmware, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-02-25.
How severe is CVE-2019-9124?: Critical severity. CVSS v3 base score is 9.8 out of 10.