What is CVE-2019-17509?

CVE-2019-17509 is a critical-severity vulnerability in Dlink Dir-846, classified under OS Command Injection. CVSS score: 9.8/10. Published 2019-10-11.

How severe is CVE-2019-17509?

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

RCE in Dlink Dir-846

CVE-2019-17509

D-Link DIR-846 devices with firmware 100A35 allow remote attackers to execute arbitrary OS commands as root by leveraging admin access and sending a /HNAP1/ request for SetMasterWLanSettings with shell metacharacters to /squashfs-root/www/HNAP1/control/SetMasterWLanSettings.php.

Vulnerability class: Command Injection (OS Command Injection)

Published 2019-10-11 · 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: 0.035 (88.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000

Affected products

Dlink Dir-846
Dlink Dir-846 Firmware — versions 100a35

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/dahua966/Routers-vuls/blob/master/DIR-846/vuls_info.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-17509?: CVE-2019-17509 is a critical-severity vulnerability in Dlink Dir-846, classified under OS Command Injection. CVSS score: 9.8/10. Published 2019-10-11.
How severe is CVE-2019-17509?: Critical severity. CVSS v3 base score is 9.8 out of 10.